Fiscal Policy

Fiscal Policy

Fiscal policy involves the use of government spending (G) and taxation (T) to influence aggregate demand and the economy. It is set by the Chancellor of the Exchequer in the UK Budget.

The Government Budget

Key Concepts

Term	Definition
Government spending (G)	Current spending (day-to-day: NHS, education, benefits) + Capital spending (investment: infrastructure, schools, hospitals)
Government revenue	Mainly taxation (income tax, VAT, corporation tax, NI contributions)
Budget deficit	G > T (government borrows the difference)
Budget surplus	T > G (government repays debt)
National debt	Total accumulated government borrowing over time
Structural deficit	The deficit that would exist even at full employment (not caused by the cycle)
Cyclical deficit	The part of the deficit caused by the recession (automatic stabilisers)

UK Government Spending Breakdown (approximate)

• Social protection (pensions, benefits): ~30%
• Health (NHS): ~20%
• Education: ~12%
• Defence: ~5%
• Debt interest: ~7%

UK Tax Revenue Breakdown (approximate)

• Income tax: ~25%
• National Insurance: ~18%
• VAT: ~17%
• Corporation tax: ~10%
• Other (fuel duty, business rates, stamp duty, etc.)

Types of Fiscal Policy

Expansionary (Loosening)

• Increase G and/or cut T
• Boosts aggregate demand → AD shifts right
• Used during recessions to stimulate growth and reduce unemployment
• Creates or widens a budget deficit

Contractionary (Tightening)

• Cut G and/or raise T
• Reduces aggregate demand → AD shifts left
• Used to cool an overheating economy, reduce inflation, or cut the deficit
• Moves towards a budget surplus

How Fiscal Policy Works

Direct Effect

• Government spending is a component of AD (G in C + I + G + (X-M))
• An increase in G directly increases AD

The Multiplier Effect

• An initial increase in G generates income for workers/firms → they spend a proportion → further income is created → and so on
• The final increase in national income is a multiple of the initial injection
• Multiplier = 1 / (1 - MPC) = 1 / MPW
• Size depends on MPC, tax rates, import propensity, savings rate

Tax Multiplier

• Tax cuts work indirectly: households receive more disposable income → increase consumption
• The tax multiplier is smaller than the government spending multiplier (some tax cut is saved, not spent)
• Formula: Tax multiplier = -MPC / MPW

Taxation

Principles of Taxation (Adam Smith's Canons)

1. Equity: taxes should be fair (ability to pay)

2. Certainty: clear and predictable

3. Convenience: easy to pay

4. Economy: low collection costs relative to revenue

Types of Tax

Direct taxes (on income/wealth):

• Income tax (progressive: 20%, 40%, 45% in UK)
• Corporation tax (on company profits)
• Capital gains tax
• Inheritance tax
• National Insurance contributions

Indirect taxes (on spending):

• VAT (20% standard rate)
• Excise duties (alcohol, tobacco, fuel)
• Air passenger duty

Progressive, Proportional, and Regressive

Type	Description	Example
Progressive	Higher earners pay a higher proportion	Income tax (higher rates for higher bands)
Proportional	Everyone pays the same proportion	Flat tax (e.g., 20% for all — not used in UK income tax)
Regressive	Lower earners pay a higher proportion	VAT (takes a larger share of a poorer person's income), fuel duty

Effects of Taxation

• On incentives: higher marginal tax rates may reduce incentive to work, invest, or take risks (Laffer curve argument)
• On distribution: progressive taxation reduces post-tax inequality
• On AD: tax changes affect disposable income → consumption → AD
• On supply side: corporation tax affects investment; income tax affects labour supply
• Tax avoidance/evasion: high rates may encourage legal avoidance (using allowances/loopholes) or illegal evasion (hiding income)

The Laffer Curve

Arthur Laffer proposed that there is a tax rate that maximises revenue:

• At 0% tax rate: zero revenue
• At 100% tax rate: zero revenue (no incentive to work)
• Somewhere between: revenue is maximised
• Beyond the revenue-maximising rate, higher rates reduce total revenue (disincentive effects dominate)

Evaluation:

• The concept is valid in principle
• But the peak rate is uncertain (estimates vary widely — probably above current UK rates)
• Used by supply-siders to justify tax cuts (Reagan, Thatcher) — but evidence is mixed
• May oversimplify (tax base matters, not just rate; compliance, avoidance, and economic conditions all interact)

Automatic vs Discretionary Fiscal Policy

Automatic Stabilisers

Built-in mechanisms that smooth the business cycle without policy decisions:

• In recession: tax revenue falls (lower incomes/profits), benefit spending rises (more unemployed) → budget deficit widens → cushions the downturn
• In boom: tax revenue rises, benefit spending falls → budget deficit narrows → dampens overheating

Discretionary Policy

Deliberate changes in G or T by the government:

• Example: 2008 UK fiscal stimulus (temporary VAT cut from 17.5% to 15%)
• Example: 2010 austerity programme (spending cuts to reduce the deficit)
• Example: COVID-19 furlough scheme (£70bn+)

Evaluation of Fiscal Policy

Strengths

• Direct impact on AD: government spending is a component — no transmission mechanism to fail
• Targeted: can direct spending to specific regions, sectors, or groups (infrastructure in deprived areas)
• Multiplier effect: amplifies the initial injection
• Automatic stabilisers work without time lags
• Effective at the zero lower bound: when monetary policy is exhausted (interest rates at ~0%), fiscal policy remains available

Weaknesses

• Time lags: recognition lag (identifying the problem), decision lag (political process), implementation lag (projects take time to start), impact lag (effects take time to feed through) — total lag may be 12-24 months
• Crowding out: government borrowing may raise interest rates → reduce private investment → offset the stimulus (monetarist critique). Counter: may not occur in a recession (spare capacity, low rates)
• Political constraints: governments may use fiscal policy for electoral reasons (cut taxes before elections) rather than economic stability
• National debt: persistent deficits accumulate debt → future interest payments → fiscal space constrained
• Ricardian equivalence (Barro): rational consumers anticipate future tax rises to repay borrowing → save more now → offset the stimulus. Counter: strong assumption of perfect rationality and foresight
• Difficult to reverse: spending increases create expectations and vested interests; cutting spending is politically painful (austerity protests)
• Supply-side effects: tax changes affect incentives, not just demand

Fiscal Rules (UK)

The UK government operates under fiscal rules (self-imposed constraints):

• Current budget balance within a time horizon
• Debt falling as a percentage of GDP
• Designed to promote credibility and fiscal discipline
• But rules have been changed or broken frequently (criticism of "moving the goalposts")

Exam Technique

• Distinguish automatic from discretionary fiscal policy
• Use the multiplier to explain why the final effect exceeds the initial change
• Evaluate using crowding out, time lags, and Ricardian equivalence as counter-arguments
• Compare fiscal with monetary policy — when is each more effective?
• Reference UK examples: 2008 stimulus, 2010 austerity, COVID-19 response, Autumn Budget decisions
• In 25-mark essays, consider both expansionary and contractionary fiscal policy with real-world context