1. Conceptual Foundations of Inflation

Inflation is the sustained increase in the overall price level of goods and services in an economy over time. It does not mean that every price rises simultaneously. Rather, it reflects a broad and persistent upward movement in average prices.

For a first-time learner, inflation is best understood not as “prices rising” but as money losing purchasing power.

If last year ₹100 could buy 10 units of a good, and this year it buys only 8 units, the difference represents inflation. The price may have risen, but what truly changed is the value of money relative to goods.

This distinction is important because inflation affects:

• Real income

• Savings

• Investment returns

• Government revenue

• Public expenditure

• Debt sustainability

Inflation transforms nominal numbers into something very different in real terms.

Nominal vs Real: The Core Idea

Economics distinguishes between nominal values (measured in current prices) and real values (adjusted for inflation).

Nominal income is what you earn in rupees.
Real income is what those rupees can actually buy.

The relationship can be written in simple structural form:

Real Value = Nominal Value ÷ Price Level

When the price level rises, real value falls — unless nominal value increases proportionately.

This simple idea drives almost every macroeconomic and investment decision.

How Inflation Is Measured

Inflation is measured using price indices. In India, the two primary indices are:

• Consumer Price Index (CPI)

• Wholesale Price Index (WPI)

CPI is more important for policy because it reflects household consumption.

The basic inflation rate formula is written in a form your editor can easily display:

Inflation Rate (%) =
[(CPI this year − CPI last year) ÷ CPI last year] × 100

If CPI was 150 last year and 165 this year:

Inflation = [(165 − 150) ÷ 150] × 100
Inflation = (15 ÷ 150) × 100
Inflation = 10%

This means average prices rose by 10%.

Types of Inflation (Concept Before Structure)

Inflation does not arise from a single cause. It emerges from different economic pressures.

Demand-Pull Inflation

Occurs when demand in the economy exceeds supply capacity.

Common triggers:

• High government spending

• Rapid credit growth

• Income expansion

If too much money chases limited goods, prices rise.

Cost-Push Inflation

Occurs when production costs increase.

Common triggers:

• Oil price shocks

• Commodity price rise

• Currency depreciation

• Wage pressures

India, being import dependent on energy, is particularly sensitive to cost-push inflation.

Core vs Headline Inflation

Headline inflation includes food and fuel.
Core inflation excludes volatile food and fuel components.

In India, food has a high weight in CPI (around 45%+), making headline inflation politically sensitive and socially impactful.

Inflation and Real Return (Investment Perspective)

Now we connect inflation to investment decisions.

If you earn 8% interest on a bond, and inflation is 6%, your real gain is not 8%.

Approximate real return formula:

Real Return ≈ Nominal Return − Inflation

So if:
Nominal Return = 8%
Inflation = 6%

Real Return ≈ 2%

For more precision:

Real Return =
[(1 + Nominal Return) ÷ (1 + Inflation)] − 1

Example:

Nominal Return = 8%
Inflation = 6%

Real Return =
[(1.08 ÷ 1.06) − 1]
= 1.0189 − 1
= 1.89%

This difference matters deeply for:

• Bond investors

• Equity valuation

• Retirement planning

• Fiscal debt analysis

Inflation and Interest Rates: The Fisher Principle

Nominal interest rates tend to reflect expected inflation.

The structural relationship:

Nominal Interest Rate = Real Interest Rate + Expected Inflation

If inflation expectations rise, lenders demand higher interest rates to protect purchasing power.

This increases:

• Government borrowing cost

• Corporate debt cost

• Mortgage rates

• Bond yields

And this directly connects inflation to fiscal sustainability.

Why Inflation Is Central to Fiscal Constraints

Inflation simultaneously:

• Boosts nominal tax revenue

• Raises subsidy expenditure

• Influences bond yields

• Changes debt dynamics

• Alters real purchasing power

It can temporarily improve fiscal ratios — but destabilise long-term macro credibility.

Inflation is not just a price statistic.

It is a structural force shaping:

• Government budgets

• Investment returns

• Asset allocation decisions

• Political stability

2. Historical Inflation Episodes in India

Inflation in India has never been a purely statistical phenomenon. It has historically emerged from structural weaknesses, external shocks, fiscal imbalances, and supply constraints. Each major inflationary episode in India reshaped policy architecture, fiscal behavior, and investor perception of macro stability.

Understanding these episodes is essential because inflation in India is rarely accidental. It is typically the result of layered economic pressures — fiscal, monetary, external, and structural.

2.1 The 1970s Oil Shock and Structural Cost Inflation

The 1970s marked India’s first major inflationary stress period after independence. The global oil crisis triggered by OPEC supply restrictions sharply increased crude oil prices. India, heavily dependent on imported oil, faced immediate cost-push inflation.

Oil prices quadrupled globally. For an economy with weak external buffers and limited foreign exchange reserves, this translated into:

• Rising import bill

• Currency pressure

• Escalating fuel costs

• Transportation cost increase

• Food price transmission

Inflation surged into double digits in several years during the decade.

Fiscal implications were severe. To cushion consumers, the government expanded price controls and subsidy mechanisms. This marked the early institutionalisation of energy-linked fiscal intervention.

The lesson from this period was structural: external supply shocks can quickly convert into domestic inflation and fiscal stress when an economy lacks flexibility.

2.2 The 1980s Fiscal Expansion and the 1991 Crisis

The 1980s saw rising fiscal deficits financed through borrowing and, indirectly, monetary expansion. Public spending expanded without proportional revenue growth. External borrowing increased.

This fiscal expansion, combined with weak export competitiveness and rising oil prices during the Gulf War period, culminated in the 1991 Balance of Payments crisis.

Inflation accelerated sharply prior to reforms, crossing elevated levels as macro stability weakened.

Consequences were systemic:

• Rupee devaluation

• Gold pledge for foreign reserves

• IMF assistance

• Structural adjustment program

• Fiscal consolidation

This episode demonstrated the interaction between fiscal deficit, inflation, and currency instability.

When fiscal discipline weakens and external buffers thin, inflation risk escalates rapidly.

For investors, this period underscored the importance of macro credibility. Bond markets react sharply when fiscal dominance appears unsustainable.

2.3 2008 Global Commodity Spike

The global financial crisis period was accompanied by significant commodity price volatility. Oil and food prices rose sharply before collapsing.

India experienced elevated inflation, particularly food inflation. The transmission mechanism was clear:

• Higher import cost

• Domestic supply bottlenecks

• Procurement price adjustments

• Rising subsidy burden

Fiscal pressure increased due to fuel under-recoveries and fertilizer subsidy expansion.

Although growth remained strong initially, inflation volatility began influencing bond yields and capital flows.

Investors started factoring inflation risk premium into Indian sovereign yields more structurally.

2.4 2010–2013: Persistent High Inflation Phase

This period is particularly important for modern macro understanding.

CPI inflation frequently remained in the 8–10% range. Food inflation was elevated due to supply constraints, rising rural wages, and structural demand shifts.

Simultaneously:

• Fiscal deficits remained high

• Current account deficit widened

• Global liquidity conditions shifted

The rupee depreciated significantly during 2013, and bond yields surged.

Inflation during this period was not merely transitory — it reflected structural imbalances:

• Food supply chain inefficiencies

• Expansionary fiscal stance

• Loose monetary conditions

• External vulnerability

Investment impact was visible:

• Bond yields moved into elevated ranges

• Equity valuation multiples compressed

• Real returns turned volatile

This phase ultimately led to institutional reform.

2.5 Adoption of Inflation Targeting (Post-2016)

India amended the RBI Act to formalize flexible inflation targeting.

Target: 4%
Tolerance Band: 2% to 6%

The Monetary Policy Committee (MPC) was institutionalized to anchor expectations.

This structural reform improved macro credibility.

Inflation volatility reduced compared to the previous decade. Bond markets began pricing sovereign risk more systematically rather than reactively.

Anchored expectations reduced long-term yield volatility.

This institutional shift is critical for investors because credibility reduces risk premium.

2.6 COVID Shock and Post-Pandemic Supply Stress

The pandemic introduced a different inflation dynamic.

Demand collapsed initially, but supply chains were severely disrupted. Later, global commodity prices surged due to logistical constraints and geopolitical tension.

India experienced:

• Food inflation spikes

• Fuel price pressures

• Imported inflation transmission

Fiscal policy expanded to support recovery. Monetary policy initially remained accommodative.

As inflation persisted, policy tightening resumed.

This episode demonstrated that modern inflation can emerge from supply constraints even without traditional demand overheating.

It also showed how quickly inflation interacts with fiscal policy — rising food prices increase procurement cost and welfare transfers.

Structural Pattern Across Episodes

Across five decades, a consistent pattern emerges:

1. External shocks transmit rapidly into domestic prices.

2. Fiscal expansion amplifies inflation persistence.

3. Currency pressure intensifies inflation dynamics.

4. Inflation influences bond yields and borrowing cost.

5. Institutional credibility moderates long-term volatility.

Inflation episodes in India are rarely isolated price events. They are macro-fiscal stress indicators.

For investment decisions, these historical phases teach one core principle:

Stable inflation enables sustainable growth and predictable returns.
Unanchored inflation destabilizes bonds, compresses equity multiples, and raises macro risk premium.

3. Inflation and Revenue Dynamics

Inflation alters government revenue in complex and sometimes deceptive ways. At first glance, moderate inflation appears fiscally beneficial because it increases nominal GDP, and most tax systems operate in nominal terms. However, the relationship between inflation and revenue sustainability is not linear.

To understand this, one must distinguish between nominal expansion and real fiscal strength.

When inflation rises, prices of goods and services increase. Since indirect taxes such as GST are levied as a percentage of transaction value, higher prices automatically generate higher tax collections — even if the volume of goods sold does not increase.

For example, if a product priced at ₹1,000 with 18% GST rises to ₹1,100 due to inflation, GST revenue per unit increases from ₹180 to ₹198. The tax rate remains unchanged, but nominal revenue rises.

This creates what may be called inflation-driven revenue buoyancy.

However, this buoyancy is conditional. If inflation erodes purchasing power and suppresses consumption volume, the positive price effect may be offset by lower demand. Thus, inflation can initially inflate tax collections but eventually weaken them if real income declines.

Direct taxes are influenced differently. When nominal wages increase due to inflation adjustments, individuals may move into higher tax brackets — a phenomenon known as bracket creep. If tax slabs are not indexed to inflation, real tax burden increases even if real income does not.

This temporarily strengthens fiscal revenue without actual improvement in real productivity.

But inflation also distorts fiscal planning. Budget projections based on expected inflation may become inaccurate if price growth deviates significantly. Overestimation or underestimation of inflation can alter revenue forecasting and deficit targets.

The relationship between inflation and nominal GDP is central here:

Nominal GDP Growth ≈ Real GDP Growth + Inflation

If inflation is high while real growth is weak, nominal GDP may appear robust. Debt-to-GDP ratios may decline mechanically due to denominator expansion, but underlying real capacity does not improve.

This creates fiscal illusion — apparent improvement without structural strengthening.

Moreover, persistent inflation affects investor confidence. If markets perceive inflation as unanchored, bond yields rise. Higher yields increase interest payments, which eventually offset temporary revenue gains.

Thus, inflation’s impact on revenue must be evaluated over multiple horizons:

Short term:
• Higher nominal tax collections
• Possible improvement in fiscal ratios

Medium term:
• Real consumption erosion
• Pressure on tax base

Long term:
• Higher interest burden
• Reduced investment
• Growth slowdown

Inflation does not permanently strengthen revenue capacity. It reshuffles nominal values while potentially weakening structural productivity.

4. Inflation and Subsidy Burden

If inflation boosts revenue temporarily, it simultaneously increases expenditure pressures — particularly in subsidy-intensive economies.

India’s fiscal structure includes significant food, fertilizer, and energy-related support systems. These are highly sensitive to price changes.

When food prices rise, the cost of procurement under the Public Distribution System increases. Minimum Support Prices (MSP) are often adjusted upward to protect farmers, which raises the food subsidy bill.

Similarly, fertilizer prices are closely tied to global commodity and energy markets. If international input costs rise, subsidy outlays increase to maintain farmer affordability.

Energy price inflation presents an even sharper dilemma. Governments must choose between allowing full pass-through to consumers or absorbing part of the shock through tax reduction or subsidy expansion. Either option affects fiscal arithmetic.

Inflation therefore multiplies subsidy burden through three channels:

1. Higher unit cost of procurement

2. Increased beneficiary transfers to maintain real value

3. Political pressure to cushion price shocks

Inflation also interacts with social welfare programs. If inflation erodes real income, demand for welfare support rises. Governments may expand transfer schemes to maintain purchasing power among vulnerable households.

This creates a cyclical pattern:

Inflation → Welfare expansion → Fiscal pressure → Borrowing increase → Interest burden rise

Moreover, if inflation leads to monetary tightening, interest rates rise. Higher rates increase the cost of financing fiscal deficits. Thus, inflation indirectly raises both primary expenditure (subsidies) and debt servicing costs.

The subsidy-inflation relationship is especially strong in developing economies because consumption baskets are heavily weighted toward essentials.

In India, food and fuel form a substantial share of household expenditure. Inflation in these categories quickly translates into political and fiscal reaction.

This is why inflation is not merely a central bank concern — it is a fiscal constraint multiplier.

The key policy challenge is balancing price stability with welfare protection. Allowing inflation to erode purchasing power can destabilize society. Overcompensating through fiscal expansion can destabilize budgets.

Sustainable fiscal management requires inflation to remain moderate and predictable.

5. Inflation and Public Debt Dynamics

Public debt sustainability is often evaluated using the debt-to-GDP ratio. Inflation influences this ratio in ways that can either temporarily relieve fiscal stress or amplify long-term instability.

The core structural identity governing debt dynamics can be written in simplified form:

Change in Debt Ratio ≈
(Interest Rate − Nominal GDP Growth) × Existing Debt Ratio

• Primary Deficit

This relationship shows that debt sustainability depends on the interaction between interest rates and nominal growth.

Since:

Nominal GDP Growth ≈ Real Growth + Inflation

Inflation directly affects the denominator of the debt ratio.

When inflation rises moderately, nominal GDP increases even if real growth remains unchanged. If interest rates do not rise proportionately, the debt-to-GDP ratio may decline.

This creates what economists call “inflation erosion of debt.”

In simple terms, fixed nominal debt becomes smaller relative to a larger nominal GDP.

For example:

If public debt is ₹100 lakh crore and nominal GDP is ₹200 lakh crore, the debt ratio is 50%.

If inflation pushes nominal GDP to ₹220 lakh crore while debt remains ₹100 lakh crore, the ratio falls to 45.5%.

However, this arithmetic relief is conditional.

If inflation becomes persistent, bond investors demand higher yields to protect real returns. Once interest rates rise, the cost of new borrowing increases. Governments that roll over debt at higher yields see interest expenditure expand.

The debt equation then shifts unfavorably.

If:

Interest Rate > Nominal GDP Growth

Debt ratio begins to rise structurally.

Thus, inflation can:

• Reduce debt burden in the short term
• Increase debt burden in the medium term if credibility weakens

Another dimension is maturity structure.

If debt is long-term and fixed-rate, moderate inflation reduces real burden.
If debt is short-term and frequently refinanced, rising yields transmit quickly into higher interest payments.

India’s sovereign debt is largely domestic and medium-to-long maturity, which provides some insulation. However, rising yields still affect marginal borrowing cost.

Inflation also affects investor risk perception.

If inflation is perceived as policy failure rather than temporary shock, sovereign risk premium rises. This increases borrowing cost beyond pure inflation expectations.

Thus, the relationship between inflation and debt is not mechanical. It depends on:

• Inflation expectations
• Central bank credibility
• Debt maturity structure
• Fiscal deficit trajectory

Inflation can be a silent reducer of debt or a trigger of debt instability — depending on policy response.

6. Inflation and Interest Burden

Interest payments are among the largest components of government expenditure. In high-debt economies, even small changes in interest rates significantly affect fiscal balance.

Inflation influences interest burden through three primary channels.

First, expected inflation raises nominal interest rates. According to the Fisher relationship:

Nominal Interest Rate = Real Rate + Expected Inflation

If inflation expectations increase by 2%, nominal yields typically adjust upward by a similar magnitude.

Second, central bank policy response matters. When inflation breaches target bands, monetary tightening increases policy rates. This transmits into government securities yields.

Higher yields increase the cost of new borrowing and refinancing.

Third, inflation volatility increases risk premium. Investors demand compensation for uncertainty, pushing yields higher than inflation alone would justify.

India’s fiscal system is sensitive to interest cost because a large portion of government borrowing is domestic and market-based. When yields rise:

• Budgeted interest expenditure increases
• Primary deficit reduction becomes harder
• Capital expenditure may get compressed

Consider a simplified example.

If outstanding debt is ₹100 lakh crore and average interest rate rises from 6% to 7%, annual interest cost increases by ₹1 lakh crore.

This is equivalent to funding multiple large infrastructure programs.

Inflation-induced yield increases therefore have direct opportunity cost.

Moreover, high interest burden creates fiscal rigidity. Governments must allocate fixed resources to debt servicing before discretionary spending.

If inflation persists, the vicious cycle can emerge:

Inflation → Rate hikes → Higher interest cost → Higher deficit → More borrowing → Further yield pressure

However, credible inflation control breaks this cycle.

When inflation expectations remain anchored, long-term yields stabilize. Even moderate inflation can coexist with manageable interest burden if policy credibility is strong.

Thus, inflation management is not only about price stability — it is about protecting fiscal flexibility.

7. Inflation, Inequality, and Welfare Pressure

Inflation does not affect all households equally. Its distributional impact depends on income structure, consumption patterns, and asset ownership. In developing economies such as India, inflation often behaves regressively — meaning it disproportionately harms lower-income households.

The reason lies in expenditure composition.

Lower-income households spend a larger share of income on essentials such as food, fuel, transportation, and basic utilities. These categories are typically the most volatile and sensitive to supply shocks. When food inflation rises, its impact on poor households is immediate and severe. Higher-income households, by contrast, allocate greater proportions of income to discretionary consumption and financial assets, which may adjust differently.

This asymmetry transforms inflation into a social policy variable.

When essential inflation rises sharply, real wages often fail to adjust instantly. Informal workers, daily wage earners, and agricultural laborers experience erosion of purchasing power. This can increase demand for government support programs — food subsidies, cash transfers, employment schemes, and fuel compensation.

Thus, inflation feeds into fiscal pressure not merely through accounting mechanics, but through social response.

There is also an asset-side inequality channel.

Households that own real assets — real estate, equities, commodities — may partially hedge against inflation. Households dependent solely on fixed wages and bank deposits may see real savings erode if nominal interest rates lag inflation.

If deposit rates remain at 5% and inflation rises to 7%, real return becomes negative. Savers effectively lose purchasing power.

This widens wealth inequality over time.

Moreover, inflation volatility increases economic uncertainty. Uncertainty reduces private investment, which slows job creation. Slower job growth amplifies inequality pressures, reinforcing demand for welfare expansion.

The political economy loop becomes clear:

Inflation → Real income erosion → Welfare expansion demand → Fiscal pressure → Borrowing increase → Interest burden rise

In societies where price stability is weak, fiscal discipline becomes harder to sustain because social protection requirements escalate.

Inflation therefore functions as both a macroeconomic variable and a distributional force.

Inflation control, therefore, is not only about growth efficiency but about protecting purchasing power of vulnerable segments.

Stable inflation anchors expectations, reduces welfare volatility, and improves fiscal planning.

8. Inflation Targeting Framework in India

Recognizing the destabilizing effects of high and volatile inflation, India formally adopted a flexible inflation targeting framework through amendment to the RBI Act.

The framework establishes:

Target Inflation = 4%
Tolerance Band = ±2%

This means inflation is considered acceptable between 2% and 6%, with 4% as the central anchor.

A Monetary Policy Committee (MPC) was institutionalized to set policy rates based on inflation outlook rather than discretionary political pressure.

This institutional reform marked a structural shift.

Before inflation targeting, monetary policy often balanced growth and inflation without a formal numeric anchor. Persistent inflation during 2010–2013 exposed the limitations of discretionary frameworks.

By introducing a clear target, India improved policy credibility.

Credibility matters because inflation expectations influence economic behavior.

If households expect prices to rise sharply, they may:

• Accelerate purchases
• Demand higher wages
• Increase inventory holding

If investors expect inflation instability, they demand higher bond yields.

Anchored expectations reduce this amplification.

The inflation targeting framework also constrains fiscal dominance.

Fiscal dominance occurs when government borrowing needs pressure central bank policy decisions. If monetary policy accommodates high deficits, inflation risk increases.

An independent inflation-targeting regime reduces the probability of such dominance.

However, coordination remains necessary.

Fiscal expansion during crises — such as COVID — may temporarily increase inflation risk. Monetary policy must respond without destabilizing recovery.

Thus, inflation targeting is not rigid price suppression. It is flexible stabilization within defined bounds.

From an investment perspective, a credible inflation targeting regime:

• Reduces bond yield volatility
• Stabilizes currency expectations
• Lowers sovereign risk premium
• Improves long-term asset valuation stability

Stable inflation is a precondition for predictable real returns.

9. Fiscal Dominance vs Monetary Discipline

One of the most important macroeconomic risks in emerging economies is the erosion of monetary independence due to fiscal pressure. This phenomenon is known as fiscal dominance.

Fiscal dominance occurs when government borrowing needs become so large that monetary policy decisions are influenced by the necessity to maintain low borrowing costs rather than price stability. In such situations, central banks may delay tightening policy despite rising inflation because higher interest rates would significantly increase government debt servicing costs.

The danger of fiscal dominance lies in its feedback loop.

When inflation rises, central banks are expected to increase policy rates to stabilize prices. However, if government debt levels are high, rate hikes increase interest expenditure sharply. Higher interest expenditure widens fiscal deficit, requiring additional borrowing. Additional borrowing can put further upward pressure on yields.

If policymakers hesitate to tighten due to debt burden concerns, inflation expectations may become unanchored. Once expectations rise, inflation persistence increases.

This creates a structural dilemma:

Tighten policy → Raise interest burden
Do not tighten → Risk inflation spiral

India’s adoption of a formal inflation targeting regime was partly designed to prevent fiscal dominance. By institutionalizing a monetary policy committee and defining a numeric inflation target, policy credibility improves and reduces the probability that fiscal pressures override price stability objectives.

However, fiscal and monetary policy cannot operate in isolation.

Large fiscal expansion during crisis periods — for example during the pandemic — may require temporary monetary accommodation. The risk arises if temporary accommodation becomes structural.

Emerging markets are particularly vulnerable because:

• Capital flows are sensitive to credibility
• Currency depreciation can amplify inflation
• External debt costs can rise rapidly

If investors perceive fiscal discipline weakening alongside inflation tolerance, sovereign risk premium increases. Bond yields rise beyond domestic inflation expectations due to credibility risk.

The structural safeguard against fiscal dominance is transparent fiscal planning, gradual deficit consolidation, and clear communication between fiscal and monetary authorities.

When fiscal discipline and inflation targeting operate coherently, macro stability strengthens. When they diverge, volatility increases.

Monetary discipline is therefore not an abstract institutional principle. It is a fiscal stabilizer.

10. Structural Conclusion: Inflation as a Fiscal Multiplier

Inflation affects fiscal sustainability in ways that are both subtle and powerful. It operates simultaneously through revenue expansion, expenditure escalation, debt arithmetic, and interest burden transmission.

In the short term, moderate inflation can create nominal fiscal relief by expanding GDP and tax collections. Debt-to-GDP ratios may decline mechanically. Revenue may appear buoyant.

In the medium term, however, inflation increases:

• Subsidy obligations
• Procurement cost
• Welfare pressure
• Borrowing cost
• Interest payments

If inflation expectations rise, bond yields increase. If yields rise above nominal growth for sustained periods, debt dynamics deteriorate.

Inflation therefore acts as a fiscal multiplier.

It amplifies both revenue and expenditure. It strengthens fiscal optics temporarily but can weaken structural stability if unmanaged.

For investors, inflation is central because it determines real returns.

Real Return ≈ Nominal Return − Inflation

High inflation erodes fixed income assets, compresses equity valuations through higher discount rates, and increases currency volatility. Stable inflation reduces risk premium across asset classes.

For policymakers, inflation control preserves fiscal flexibility.

Low and predictable inflation:

• Stabilizes bond yields
• Protects real incomes
• Reduces welfare volatility
• Improves investment planning
• Anchors debt sustainability

The optimal macro equilibrium for India is not zero inflation but stable, moderate inflation aligned with growth potential.

When inflation remains within credible bounds, fiscal policy can plan capital expenditure, manage debt, and support welfare without destabilizing markets.

When inflation becomes volatile, fiscal arithmetic becomes fragile.

Inflation is not merely a consumer price index number. It is a structural force shaping:

• Government budgets
• Debt sustainability
• Capital market returns
• Household purchasing power
• Political stability

In the architecture of fiscal constraints, inflation is the multiplier that connects monetary credibility with fiscal endurance.