Introduction
Japan's ageing population presents significant economic challenges, particularly around deflation and a growing fiscal deficit. Deflation refers to a sustained decrease in the general price level, which can lower consumer spending, reduce business investment and slow economic growth. A fiscal deficit occurs when government expenditure exceeds revenue, leading to increased borrowing and rising national debt. A growing fiscal deficit suggests that government spending is rising, tax revenues are falling, or both, potentially straining the economy further. Given Japan's demographic shift, the government must consider whether to prioritise tackling deflation to support growth or addressing its fiscal deficit to ensure long-term fiscal sustainability.
Why Japan should be more concerned with deflation
Persistent deflation reduces consumer confidence and spending, as individuals may delay purchases in anticipation of even lower prices in the future. As households postpone consumption, aggregate demand (AD) declines from AD0 to AD1, lowering real national income via the multiplier effect from Y0 to Y1. Lower aggregate demand reduces business revenues, discouraging firms from expanding production or hiring, which lowers economic growth and raises unemployment, reinforcing the deflationary spiral.
A deflationary environment also breeds pessimism among investors, as firms may view the economy as stagnant or ailing. This lowers investment (I), reducing aggregate demand and further weakening growth. From an aggregate supply perspective, lower investment results in reduced capital stock, lowering potential growth in the long run, represented by a leftward shift in long-run aggregate supply from AS0 to AS1. Deflation may also worsen the capital account, as foreign investors become reluctant to invest in an economy experiencing prolonged price declines.
Japan experienced almost a decade of deflation during the 1990s, which led to prolonged stagnation, weak consumer spending and declining investment. The expectation of continuous price declines created a self-reinforcing cycle of pessimism in which both consumers and businesses refrained from spending, severely weakening Japan's economic dynamism and reducing productivity growth and innovation. If deflation is not addressed, Japan risks another period of long-term stagnation, which could be even more damaging given its ageing population.
Why Japan should be more concerned with its growing fiscal deficit
A persistent fiscal deficit means the Japanese government must borrow more to finance its expenditure, raising the national debt. A rising debt level increases interest payments on government bonds, diverting public funds away from essential services such as healthcare, education and infrastructure. There is an opportunity cost involved, as resources used for debt servicing could have been spent on economic development and social welfare. Given Japan's ageing population, managing future interest payments and debt obligations may become increasingly difficult.
If the government does not address its fiscal deficit, it may find it difficult to increase spending when needed in future. In an economic downturn or financial crisis, the government may struggle to implement expansionary fiscal policy because of limited fiscal capacity. Rising healthcare costs associated with an ageing population will require increased government expenditure, making it essential to stabilise public finances now. Failure to reduce the fiscal deficit could leave the government unable to fund critical services, lowering public welfare and social stability.
In light of the ageing population, the fiscal deficit is the greater problem
While deflation poses a serious risk to growth, addressing the growing fiscal deficit should be the priority in the long run, because there is an inherent conflict between the two goals. Using expansionary fiscal policy to combat deflation, such as increased government spending, would worsen the fiscal deficit, while reducing the deficit through spending cuts or higher taxes could deepen deflationary pressures.
Japan's ageing population makes its fiscal deficit increasingly urgent, as tax revenues are expected to decline while government spending on pensions and healthcare is set to rise. Japan therefore cannot afford to delay addressing its fiscal deficit, as the problem will only worsen over time and make future solutions more difficult. Solving the fiscal deficit now is more sustainable than postponing it, since delaying action may require even harsher fiscal adjustments later, which could damage social stability.
Conclusion
Japan faces two major challenges: persistent deflation, which dampens growth and investor confidence, and a growing fiscal deficit, which threatens long-term fiscal sustainability. While deflation can slow growth and lead to stagnation, the ageing population makes addressing the fiscal deficit more urgent, since a shrinking workforce means lower tax revenues and rising government expenditure, making debt management increasingly difficult. Although expansionary policies could counter deflation, they risk exacerbating Japan's fiscal problems. Given the long-term risks posed by an ageing population, reducing Japan's fiscal deficit should therefore take priority over addressing deflation, ensuring fiscal stability and economic resilience in the years ahead.