Table: Mean annual household market and disposable income by income quintiles
| Quintile Group | Market Income (£ per year) | Disposable Income (£ per year) |
|---|---|---|
| Top 20% | 120,000 | 84,000 |
| Fourth Quintile | 60,000 | 48,000 |
| Third Quintile | 34,000 | 38,000 |
| Second Quintile | 18,000 | 28,000 |
| Bottom 20% | 8,000 | 22,000 |
Proponents of market-oriented policies argue that a degree of income and wealth inequality is not only inevitable but serves as a vital catalyst for economic dynamism. Under competitive market conditions, factor rewards align closely with marginal revenue productivity (MRP). This correlation provides essential incentives for individuals to invest in their own human capital, work longer hours, and undertake risky entrepreneurial ventures. When innovative business owners are permitted to retain their financial gains, it drives investment in capital and creates high-value jobs. Over the long run, this wealth-creation process expands the productive capacity of the economy, boosting absolute living standards for all citizens, even if the relative gap between the richest and poorest widens.
Conversely, critics contend that widening inequality acts as a structural drag on macroeconomic performance and introduces systemic instability. Because lower-income households have a significantly higher marginal propensity to consume (MPC) than high-income households, concentrating income at the top reduces the economy's average propensity to consume, thereby dampening aggregate demand. To maintain living standards, lower-income households are often forced to accumulate unsustainable private debt. Additionally, excessive concentrations of wealth frequently flow into speculative real estate and financial markets rather than productive physical investment, distorting asset prices. Furthermore, massive economic disparity can lead to institutional capture, where wealthy interest groups lobby to protect monopoly rents and weaken regulatory frameworks, harming overall economic efficiency.
Extract B suggests that wage inequality and reward differentials "incentivise investment in human capital... and drive long-term macroeconomic efficiency."
Using the data in the extracts and your economic knowledge, assess the view that rising income and wealth inequality is ultimately beneficial to society.
