Understanding Income and Wealth Inequality Revision Notes | GCSE AQA Economics

1. Why Income and Wealth Inequality Matters

According to ONS estimates, the richest 10% of households hold around 45% of all wealth. The bottom 50% hold less than 9% (figures are approximate and subject to revision between survey waves). Those numbers are not abstract — they shape life chances, health outcomes, and political stability.

This lesson covers one of the AQA Paper 2 government objectives: reducing inequality. To evaluate government policy on this, you first need to understand what inequality is, why it arises, and what it costs the economy when it goes unchecked.

2. Income vs Wealth — Getting the Distinction Right

Think of income as water flowing through a tap — it arrives regularly (weekly wages, monthly salary, state benefits). Wealth is the water already stored in the tank — property, savings, shares, and pension pots built up over a lifetime.

Wealth is a stock concept — it is measured at a single point in time, not over a period. A retired homeowner with no job may have low income but very high wealth if their property has risen in value over decades.

3. The Distribution of Income in the UK

Income in the UK is not shared equally. Economists measure this distribution by dividing the population into groups and comparing what share of total income each group receives.

One common method is to split households into five equal groups called quintiles — each containing 20% of the population — ranked from lowest to highest income. The top quintile consistently receives a far larger share of total income than the bottom quintile.

The chart above shows original income — earnings before taxes and benefits are applied. After the government redistributes income through taxes and benefits, the gap narrows, but significant inequality remains. This redistribution is a key government tool for addressing inequality.

Another measure used is the Gini coefficient — a number between 0 and 1 where 0 means perfect equality (everyone earns the same) and 1 means perfect inequality (one person earns everything). The UK's Gini coefficient for income is typically around 0.35, indicating moderate but persistent inequality.

4. Causes of Income and Wealth Inequality

Inequality does not appear by accident. Several interconnected forces drive the gap between those at the top and bottom of the distribution. Understanding these causes is essential for evaluating whether government policy can actually close the gap.

The causes of income inequality and wealth inequality overlap, but they are not identical. Income inequality feeds wealth inequality over time — higher earners save more, invest more, and accumulate assets faster. This is why wealth inequality is almost always more extreme than income inequality in any given country.

• Differences in wages and salaries: Skilled workers, professionals, and senior managers command higher wages due to their productivity and scarcity. A surgeon earns far more than a care worker, reflecting differences in training, qualifications, and labour market demand.
• Employment status: Those in full-time, permanent employment earn more than part-time or zero-hours contract workers. Unemployment means no earned income at all, pushing households towards the bottom of the distribution.
• Ownership of assets: Those who own property, shares, or businesses receive rental income, dividends, and capital gains — forms of income unavailable to those without assets. This directly links wealth inequality to income inequality.
• Inheritance and intergenerational transfers: Wealth passed down through families allows some individuals to start adult life with significant assets, compounding advantage over time.
• Education and human capital: Higher levels of education and vocational training increase earning potential. Those with access to better schools and universities tend to enter higher-paid occupations.
• Discrimination: Gender, ethnicity, and disability can affect access to employment and pay levels, contributing to persistent income gaps between groups.
• Geographic location: Wages and employment opportunities vary significantly across UK regions. London and the South East typically offer higher wages than many parts of the North or Wales.

Notice how these causes reinforce each other. A child born into a wealthy family is more likely to attend a well-resourced school, gain qualifications, enter a high-paid profession, accumulate savings, and eventually pass wealth on to their own children. Economists call this intergenerational inequality — inequality that reproduces itself across generations.

5. How Inequality in the Distribution of Income Can Occur

The labour market is the main arena where income inequality is generated. Wages are determined by the forces of supply and demand for different types of labour — and those forces do not treat all workers equally.

When demand for a particular skill rises — say, software engineering — wages for that skill rise. When demand for a skill falls — say, coal mining — wages fall and workers may face unemployment. This market mechanism produces winners and losers, and the gap between them can be large.

Beyond the labour market, income inequality also arises from the tax and benefit system — or rather, from its limits. The government uses progressive taxation (where higher earners pay a larger percentage of income in tax) and welfare benefits to redistribute income. Where this redistribution is insufficient or poorly targeted, inequality in disposable income persists even after government intervention.

Worked example: Tracing How Income Inequality Arises: A Chain of Analysis

Explain, using a chain of analysis, how differences in education and skills can lead to income inequality.

1. Some individuals have access to higher levels of education and vocational training; others do not. — This is the root cause — unequal access to human capital development.
2. Higher qualifications increase a worker's productivity and make them scarcer in the labour market. — Firms are willing to pay more for productive, hard-to-replace workers — this is the demand side of the labour market.
3. Demand for highly skilled workers exceeds supply → wages for skilled workers rise above those for unskilled workers. — This is where income inequality is directly generated — the wage gap widens between skill groups.
4. Higher wages → greater ability to save and invest → accumulation of wealth assets → additional income from dividends and rent. — Income inequality feeds wealth inequality, which then generates further income from assets — the gap compounds.
5. Reducing inequality requires either improving access to education (supply-side) or redistributing income through taxes and benefits (demand-side policy). — This connects the cause to the policy response — essential for evaluation questions.

Answer: Unequal access to education → lower productivity for some workers → lower wages → less saving and investment → less wealth accumulation → persistent income and wealth inequality across generations.

6. Consequences of Income and Wealth Inequality

High inequality is not merely a fairness concern — it has measurable economic consequences. Understanding these consequences allows you to evaluate why reducing inequality is a government objective in the first place.

For individuals at the bottom of the distribution, low income means reduced access to nutrition, healthcare, housing, and education. This creates a self-reinforcing cycle of deprivation: poor health reduces productivity, which reduces earning potential, which perpetuates low income. (Note: in economics, a 'poverty trap' more precisely refers to the disincentive created when benefits are withdrawn as income rises, making work financially unattractive — a distinct but related concept.)

At the macroeconomic level, high inequality can reduce aggregate demand (AD). Lower-income households spend a higher proportion of their income — they have a higher marginal propensity to consume (MPC). When income is concentrated at the top, where the MPC is lower, total consumer spending in the economy may be weaker than it would be with a more equal distribution.

There are also consequences for social cohesion and public services. Greater inequality is associated with higher rates of crime, poorer health outcomes, and lower levels of social trust. These outcomes increase pressure on public spending — on the NHS, policing, and welfare — which has fiscal implications for the government.

7. Exam Technique — Getting Full Marks on Inequality Questions

AQA Paper 2 questions on inequality typically ask you to explain causes, analyse consequences, or evaluate government policy responses. The most common reason students lose marks is writing a list of points without a chain of reasoning connecting them.

For an 'Explain' question (4 marks), you need: a definition, a cause or mechanism, and a developed consequence. For an 'Evaluate' question (6–9 marks), you need all of that plus a counter-argument and a reasoned conclusion. The evaluation hooks below will help you reach the top band.