Explain government failure and its main causes, and use it to evaluate whether intervention improves on the market

What this dot point is asking

SEAB wants you to explain government failure, identify its main causes, and use it to evaluate whether intervention actually improves on the market. The central insight is that correcting market failure is not free or guaranteed: intervention can itself misallocate resources, so the real test of any policy is whether it produces a net welfare gain.

The answer

What government failure means

This does not mean government should never act; it means intervention has costs and risks that must be weighed against the market failure it addresses.

The main causes

• Imperfect information. The government cannot perfectly measure an externality or consumer valuation, so it sets a tax, subsidy or quota at the wrong level, overshooting or undershooting the optimum.
• Unintended consequences. Interventions distort incentives in ways policymakers did not foresee: a rent ceiling causes shortages and black markets; a generous subsidy encourages over-supply or dependency; a quota encourages avoidance.
• Conflicting objectives. Policies often pursue several aims (efficiency, equity, the budget) that conflict, so meeting one worsens another.
• Regulatory capture and political self-interest. Regulators can be captured by the industries they oversee, and politicians may pursue short-term electoral gains rather than long-term welfare, so policy serves vested interests.
• Administrative and enforcement costs. Designing, running and policing a policy uses real resources; if these exceed the benefit, the policy is not worthwhile.
• Time lags. Recognising a problem, deciding on action and seeing it take effect all take time, so a policy can arrive too late or be ill-suited to changed conditions.

Evaluating intervention

Government failure does not argue for doing nothing; market failures have large costs too. It argues for careful, evidence-based intervention: intervene where the expected net gain is clear, choose the least-distorting tool, prefer market-based instruments that work with the price mechanism, build in review and adjustment, and watch for capture and unintended effects. This balanced stance is exactly what high-mark evaluation answers display.

Examples in context

Example 1. Subsidies that outlive their purpose. A subsidy introduced to support an infant industry can persist long after the industry matures, distorting incentives, propping up inefficient firms and costing the budget. The episode shows information and political-economy causes of government failure: the difficulty of knowing when to withdraw support and the pressure from beneficiaries to keep it.

Example 2. Singapore's preference for market-based tools. Singapore's use of Electronic Road Pricing and a carbon tax, rather than blanket bans, reflects an explicit strategy to correct externalities while minimising the distortion and unintended consequences that blunt regulation can bring. It is a practical example of choosing the least-distorting instrument to reduce the risk of government failure.

Try this

Q1. Define government failure. [2 marks]

• Cue. When government intervention to correct a market failure causes a net welfare loss, so the outcome is worse than, or no better than, the unregulated market.

Q2. Explain one way a price ceiling can lead to government failure. [3 marks]

• Cue. A ceiling below equilibrium creates a shortage and a black market, and discourages supply over time, so the welfare loss from these effects can exceed the intended affordability gain.

Q3. State the test for whether an intervention is justified. [2 marks]

• Cue. Whether its expected benefit (welfare gained by correcting the failure) exceeds its total cost (administration, distortion and unintended consequences), giving a net welfare gain.