Fptp is fine if one of the main parties is liberal

At an election we have the chance to choose a representative to vote on our behalf but we are also choosing a government which has legal powers over us. The government, if it means anything, has superior legal powers to the rest of the population otherwise all legislation from the government could be rejected by the people rendering it meaningless.

Given that to vote is to choose a master, voters will be motivated to vote for the most lenient and least oppressive (the least expensive) candidate available. If there is a broad choice of candidate then it is possible for voters to choose candidates which will be very liberal and have almost no negative bearing on the lives of the people. But if choice is reduced via the first-past-the-post voting method then voters are likely to waste their vote if they do not vote for one of the established candidates. The least bad of many options is much less bad than the least bad of merely two (or three).

More choice leads to less government but even if we can only choose from between just two candidates (as is often the case with fptp) it is still, at least theoretically, possible to choose a liberal candidate. A two-party system does not make it impossible for liberals to get into power. So the problem with a two-party system is caused only by the two parties on offer being bad, for example if one of the parties is religious and seeks to impose its non-scientific view of the world on the people then this is objectively bad and voters will find it difficult to support that party leaving them with only one (meaningful) party to vote for. But this lack of choice is not the fault of fptp itself the blame (if there is blame) lies with the parties which are favoured by fptp. Fptp is not objectively bad because lack of choice is not objectively bad (we could be offered absolute freedom without an election and this would be good), fptp is bad only if (one or) both of the favoured parties is bad. If one of the main parties is (genuinely) liberal then voters have a suitable choice and there is no problem with fptp.

If one of the main parties is electable then there is no problem with fptp.