Proportional Representation gives a voice to minority candidates and parties

The argument

Adopting Proportional Representation would give smaller parties in the UK, such as the Liberal Democrats, the Green Party and UKIP, the chance to gain more seats in Parliament. Currently, although many small parties collectively gain a significant share of the vote, they receive far fewer seats than the two larger parties, due to the electoral design. For example, one study has shown that in the 2019 UK election, 16% of the vote share (5.2 million votes) was won by the Green Party, the Liberal Democrats and the Brexit Party, however they received just 2% of parliamentary seats. This was even more marked in the 2015 election, where the Greens won 1.1.m votes and UKIP 3.8m, yet both parties only sent one MP to parliament. The current first-past-the-post system also means that the amount of votes needed to elect an MP from each party is wildly variable depending on the size of the party. For larger parties such as the Conservatives and Labour, in the 2019 election, they required 38,000 and 50,000 votes to elect an MP respectively. In stark contrast, it took 800,000 votes to elect one Green MP, and although the Brexit party received 600,000 votes they received no MP. Smaller parties in Parliament mean a greater diversity of political opinion. With Proportional Representation, the smaller parties stand a chance of having a greater number of representatives elected to parliament, and therefore they stand to influence policy making and debate in a way currently out of reach.

Context

Proportional Representation is a voting system whereby the number of popular votes determines the number of seats held by a political party in parliament. Currently, the UK uses the first-past-the-post system of voting, where voters must vote for one MP in their area. This can result in people strategically voting not for their favourite candidate, but for the candidate they believe is most likely to win in their area. In 2011, the UK held a referendum on the 'Alternative Vote.' Although it was defeated by nearly 68%, it stoked a discussion about what kind of electoral system was best for the United Kingdom. One of the solutions repeatedly proposed is a form of Proportional Representation.

Premises

Counter-arguments

Defenders of first-past-the-post reply that the disproportion the argument laments is a deliberate feature, not a flaw. By translating a plurality into a governing majority, FPTP tends to produce single-party governments that can act decisively and be held clearly accountable at the next election, whereas proportional systems routinely require post-election coalition bargaining in which small parties extract concessions out of all proportion to their support — the very 'voice' the argument praises can become a disproportionate veto. Critics also note that giving seats to any party that clears a low threshold hands a platform to fringe and extremist parties as readily as to the Greens or Liberal Democrats. And the vote-to-seat gap partly reflects that support for small parties is thinly spread rather than concentrated enough to win a constituency; FPTP rewards local pluralities and preserves a direct link between an MP and a defined geographic seat, which pure list-PR weakens.

Rejecting the premises

[Rejecting P1] Defenders argue the low seat share for dispersed small parties is the intended effect of a system built to manufacture governing majorities, not evidence of unfairness. [Rejecting P2] The '800,000 votes per Green MP' figure reflects geographically scattered support; concentrate the same votes and FPTP elects MPs, so the disparity is about vote distribution, not disenfranchisement. [Rejecting P3] More parties in parliament need not improve governance: critics contend it can fragment the legislature, force unstable coalitions and hand small parties leverage far exceeding their vote share.