The state would be more popular with pr

First past the post is bad for the survival of the state... fptp hastens the arrival of anarchy because it fosters ill-feeling towards the state. If the state openly defends unfairness then it is unlikely that people will think favourably towards it. (The electorate is virtuous.) People might not mind the state so much if it fair and proportional. Because the state uses unfair fptp it is not very popular.