Key Definitions and Distinctions

A fiscal deficit exists when government spending is greater than tax revenue in a single year, so \( G > T \).

The national debt is the accumulated total of all past government borrowing, taking account of past deficits and surpluses.

Automatic stabilisers are non-discretionary changes in government spending and tax revenue that automatically smooth the economic cycle.

For example, welfare spending rises and tax revenue falls in a recession.

Discretionary fiscal policy means deliberate changes to government spending or taxation in order to manage aggregate demand.

A cyclical deficit is the part of the deficit caused by the economic cycle, such as recession, and it should shrink as the economy recovers.

A structural deficit is the part of the deficit that exists even at the peak of the economic cycle, when the economy is near full employment.

This indicates a more permanent imbalance between government spending and revenue.

Factors Influencing the Size of Deficits and Debt

State of the Economy

The economic cycle is often the biggest influence. Deficits usually widen automatically in recessions because tax revenue falls and government spending rises.

They usually narrow in booms as revenue rises and welfare spending falls.

Government Policy

Discretionary policy decisions to raise spending or cut taxes will generally increase the deficit, and the reverse will tend to reduce it.

Demographic Changes

An ageing population can increase structural spending on pensions and healthcare.

Unforeseen Events

Wars, pandemics, and financial crises may lead to large and unexpected increases in spending.

Interest Rates

Higher interest rates raise the cost of servicing existing debt, which increases government spending.

Significance and Consequences

Debt Servicing Costs

High debt creates large interest payments, which means an opportunity cost because that money cannot be used for public services or tax cuts.

Inter-generational Equity

Current borrowing may pass a financial burden to future taxpayers.

Crowding Out

Government borrowing may push up interest rates, making it harder for private firms to borrow and invest. This can reduce long-run growth.

Fiscal Flexibility

High debt can limit the government's ability to use discretionary fiscal policy in future recessions.

Market Confidence and Credit Ratings

If debt appears unsustainable, lenders may demand higher interest rates or become unwilling to lend at all.

A downgrade in a country's credit rating can therefore increase borrowing costs.

Evaluation and Application

A very important distinction is between automatic stabilisers, which work without new legislation, and discretionary policy, which involves active government decisions.

Another major evaluation point is the difference between cyclical and structural deficits. A large deficit in a deep recession is mainly cyclical and often less worrying than a large deficit during a boom.

There is no single safe level of debt. The impact depends on what the borrowing was used for, the growth rate of the economy, and the rate of interest.

Policies designed to reduce a deficit, such as austerity through lower spending or higher taxes, may reduce aggregate demand in the short run and create a painful trade-off between fiscal sustainability and growth.

Exam Preparation