Politicians do not understand the electorate because of fptp

First past the post enables politicians to not know what people want. With pr we know what people want (even if they are wrong) because they have a free choice and no reason to vote tactically. Tactical voting means that politicians may get votes in spite of people not entirely agreeing with them... and not get votes even if people agree with them. Fptp makes politics confusing for politicians who do not know what people want.