Government intervention in Labour markets (Government intervention)

A national minimum wage (NMW) is a legal minimum hourly rate of pay that employers must pay their workers. It is a form of price floor (a minimum price) applied to the labour market, and its purpose is a normative one: to raise the pay of the lowest earners, reduce poverty and in-work inequality, and strengthen the incentive to work rather than claim benefits.

A living wage is a related idea: a higher floor deliberately set to cover the basic cost of living (housing, food, transport) in a particular country or city, rather than just a legal minimum. In the UK, for example, the statutory "National Living Wage" is a higher rate for older workers. For exam purposes, treat both as wage floors — a living wage is simply a minimum wage set at a higher level.

The single most important condition is this: a wage floor only has an effect if it is set ABOVE the market equilibrium wage.

• If the minimum wage is set above the equilibrium wage, it binds ("bites"): it forces the wage up above where supply and demand would have cleared, and the market is pushed off its equilibrium.
• If it is set at or below the equilibrium wage, it is irrelevant — the market wage is already legal, so nothing changes.

This is why an NMW that is "too low" is criticised for doing nothing, while one that is "too high" is criticised for causing unemployment. Everything in the two diagrams that follow flows from where the floor sits relative to equilibrium, and — crucially — from the structure of the labour market it is imposed on.

Start with an ordinary competitive labour market: an upward-sloping supply of labour (S) and a downward-sloping demand for labour (D = MRP), meeting at the equilibrium wage We and employment Le. Now impose a minimum wage Wmin set ABOVE We.

Read the diagram in order:

1. Find the free-market equilibrium. Supply meets demand at We / Le — the wage and employment that would clear the market with no intervention.
2. Draw the floor above equilibrium. The minimum wage Wmin is a horizontal line above We. Employers may not legally pay less.
3. Read demand off D at Wmin. At the higher wage, firms want fewer workers: read across to the demand curve to get Ld (below Le). Labour is more expensive, so quantity demanded falls.
4. Read supply off S at Wmin. At the higher wage, more people want to work: read across to the supply curve to get Ls (above Le). Quantity supplied rises.
5. Identify the excess supply. Because Ls > Ld, there is an excess supply of labour — the bracketed gap. This is unemployment caused by the minimum wage: more people want jobs at Wmin than firms will hire.

So in a competitive market a binding minimum wage has two effects at once. Those who keep their jobs are paid more (Wmin > We), which reduces poverty and in-work inequality — the intended benefit. But fewer are employed (Ld < Le) and the excess supply (Ls − Ld) is unemployment — the unintended cost. The size of the job loss depends on the elasticity of demand for labour: if labour demand is inelastic (hard to automate, small share of costs), the fall in employment is small; if elastic, the job losses are large.

The competitive result — that a minimum wage causes unemployment — is not universal. In a monopsony (a single or dominant buyer of labour) the same policy can raise both the wage and employment. This is the most powerful evaluation point in the whole subtopic.

Recall the monopsony mechanics. The firm faces the supply of labour as its average cost (S = ACL), and because hiring one more worker means raising the wage for all workers, the marginal cost of labour (MCL) lies above ACL. Left alone, the monopsonist hires where MCL = MRP (quantity Qm) but pays the low wage Wm read off the supply/ACL curve — fewer workers at a lower wage than a competitive market.

Now impose a minimum wage set at (or near) the competitive level:

Why employment RISES here:

1. Unregulated monopsony. The firm hires Qm where MCL = MRP, but pays only Wm (read down to S = ACL). Employment and pay are both held down by its buying power.
2. Impose Wmin at the competitive level. The minimum wage becomes a horizontal wage line at Wmin. Up to the point where this line meets the supply curve, the firm can now hire any number of workers at the fixed wage Wmin — so along that stretch the wage line is the marginal cost of labour (paying more for the next worker no longer raises the wage of the others, because the law fixes it).
3. The firm hires more. With the wage fixed at Wmin, the firm's effective MCL is flat at Wmin, so it hires up to where this flat wage line meets MRP — the larger quantity Qnew.
4. Both rise. Compared with the unregulated outcome, the wage rises from Wm to Wmin and employment rises from Qm to Qnew. The minimum wage has removed the monopsonist's power to suppress the wage, so it raises pay without cutting jobs — indeed jobs increase.

This is the killer evaluation: the effect of a minimum wage depends on the market structure. In a competitive market it can cause unemployment; in a monopsony (think a dominant employer in a one-industry town, or a large national employer of low-paid workers) it can raise both wages and employment. Set the floor too high in a monopsony, though — above the competitive level — and job losses can reappear, so the exact level matters.

Maximum wages (pay caps). A maximum wage is a legal ceiling on how much a worker (or role) can be paid — the mirror image of a minimum wage. It is a price ceiling in the labour market, sometimes proposed to curb "excessive" executive or banker pay and reduce inequality. To have any effect it must be set BELOW the market wage; set above, it is irrelevant.

If a maximum wage binds, it holds pay below the level supply and demand would set, so:

• Excess demand for that labour — firms want more of the (now cheaper) workers than are willing to supply at the capped wage, causing shortages of high-skill staff.
• A brain drain — top talent may emigrate or move to countries/sectors without the cap, or reduce effort — weakening productivity and, ironically, the tax base.

Because of these effects, maximum wages are rare in practice and are usually evaluated critically in the exam.

Public-sector wage setting. The government is itself a huge employer — of nurses, teachers, soldiers, civil servants — and often the dominant (monopsony) buyer of these skills. So it can set pay directly rather than leave it to the market. Its choices have big effects:

• A public-sector pay rise can attract and retain staff, ease shortages, and (via the multiplier) support demand — but it costs the taxpayer and can add to a budget deficit.
• A public-sector pay freeze or cap (holding pay below inflation) saves money but can worsen recruitment and retention, damage morale and productivity, and — since the state is often a monopsonist — leave pay below the competitive level, causing shortages (e.g. of nurses).

The evaluation is a familiar trade-off: fiscal cost and inflation pressure versus staffing, service quality and fairness — and, because the state is frequently a monopsony employer, a well-judged rise can improve both pay and staffing, echoing the minimum-wage-in-monopsony result.

A major cause of labour-market failure is labour immobility — workers being unable to move to where jobs are. It comes in two forms:

• Occupational immobility — workers lack the skills to switch from a declining industry to a growing one (e.g. a redundant coal miner cannot immediately become a software engineer).
• Geographical immobility — workers cannot move location to where jobs are, because of housing costs, family ties, or imperfect information about vacancies elsewhere.

Immobility keeps some regions/occupations in surplus (unemployment) while others have shortages and rising wages. Governments intervene to raise mobility:

Education and training (raising occupational mobility). Funding vocational training, apprenticeships, retraining schemes and adult education gives workers the skills to move into growing sectors. This raises their marginal revenue product, makes them employable in more occupations, and increases the supply of labour to shortage industries — shifting the relevant labour supply curve rightward, easing shortages and, over time, raising productivity and growth.

Subsidies to relocate (raising geographical mobility). Governments can subsidise the cost of moving — relocation grants, help with housing or transport, or improving information about vacancies — so workers can move from high-unemployment to high-vacancy regions. This increases the supply of labour where it is scarce, again shifting labour supply rightward in the shortage region.

Both policies work on the supply side of the labour market: by making workers more skilled or more mobile, they shift labour supply, correcting the mismatch between where workers are and where jobs are. The catches for evaluation are the familiar ones: training and grants have large upfront costs and long time lags (retraining takes years), the benefits are uncertain (trained workers may still not find work, or may emigrate), and there is a risk of government failure if schemes are poorly targeted or captured by providers.

Beyond wage-setting and mobility, three further interventions complete the spec-3.5 toolkit.

Anti-discrimination legislation. Laws banning discrimination in pay and hiring on the basis of gender, ethnicity, age or disability aim to correct a labour-market failure: discrimination means some workers are paid less or excluded despite equal productivity (MRP). Effective anti-discrimination law widens the effective supply of labour to employers, promotes fair pay for equal work, improves allocative efficiency (talent is used where it is most productive) and reduces inequality. The evaluation is enforcement: laws that are hard to monitor or weakly policed may change little in practice, and firms may find subtle ways around them.

Migration policy. By controlling immigration and emigration, governments directly change the supply of labour. Relaxing immigration increases labour supply — filling shortages (e.g. seasonal farm work, health workers), moderating wage growth in shortage sectors, and supporting output; but critics argue it can hold down wages for existing low-paid workers and strain public services. Tightening immigration reduces labour supply, which can raise wages in affected sectors but worsen shortages and raise firms' costs. Migration policy is therefore a labour-supply lever whose effects depend on which skills are affected and the state of the wider economy.

Trade-union legislation. A trade union is an organisation that bargains collectively on behalf of workers, and can push wages above the competitive level (much like a minimum wage) — potentially causing unemployment in a competitive market, but able to raise both wages and employment when it bargains with a monopsony employer (acting as a countervailing power). Governments legislate to strengthen or weaken union power: pro-union laws (rights to organise, to strike) shift bargaining power toward workers; restrictive laws (ballot thresholds, limits on strikes) shift it toward employers, aiming to reduce wage-push pressure and improve labour-market flexibility. The verdict depends on the market structure — unions are most defensible where they offset monopsony power.