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by bongodongobob 542 days ago
I think fundamentally it's because you have to convince the elected to pass laws that potentially undermine the way they got there, essentially asking them to kick out the ladder from underneath them. Couple that with the average person thinking that FPTP is the most fair because explaining why it isn't is counterintuitive, nothing is ever going to change.
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Explaining why FPTP is unfair in the abstract is not difficult at all.

The problem is that US specifically has a political climate which can be summed up as, "the ends justify the means". While both parties still ritually extoll the importance of democracy and fairness, as soon as it's down to one particular wedge issue, winning is more important than preserving the integrity of the system.

To a large extent, this is because there's basically zero trust between differing factions - it is assumed that your political opponents will squeeze out every advantage they can out of the system when they are in power, no matter how unfair, and so when you are in power, if you don't do the same, you basically hand them victory on policy long-term. Arguably was originally Republicans who triggered this cycle during the Obama presidency, but it's hardly important now - the point is that once trust is broken, it quickly becomes a positive feedback loop.

So, getting back to electoral system, your average voter looks at those proposals to replace FPTP with RCV or whatever, and the first thing they ask is not, "is this more fair?", but rather, "how will this affect the balance of power?". And in any given constituency, the answer is that it will take power away from the current majority (or plurality) and hand it to their opposition. This is both obvious and easy to explain, so that's the usual agitprop angle, and it sells very well.