Dean Burnett: People often complain about how unintelligent people are elected to political office, but why does it keep happening?

Politicians. Their reputation is very poor. In fairness, this is largely their own fault, but it would be foolish to assume every politician is like this. If they were, the whole infrastructure would collapse before you could say “can I claim this on expenses?” Still, everyone assumes they’re despicable, so always assume the worst.

Politician enacts a bad policy? They’re a terrible person. They change their mind and reverse it? They’re weak and not fit to lead. Politicians promise improvements (cut taxes, increase spending)? They’re obviously lying. Politicians promise to do something unpopular (raise taxes, cut spending)? A cast-iron guarantee it will happen. It’s a lose-lose situation, so why do they bother? Many politicians are clearly in it for themselves, but there surely are plenty who really do want the best and just put up with the negative opinions they get.

So, for the record, not all politicians are idiots (although your definition of idiot may vary). But plenty are. The US seem particularly afflicted with them; Sarah Palin, Ted Cruz, these people were/are contenders for the presidency. And the archetype George W Bush WAS the president. For 8 YEARS. The man whose idiotic musings managed to sustain businesses had a nuclear arsenal at his command.
Source: Democracy v Psychology: why people keep electing idiots | Dean Burnett | Science | The Guardian