Because children light up when they hear keywords like 'fairness' and 'equal probability', not realising the economic problems the left creates.
Talented lefty's (the A-Class) tend to head into politics whilst talented righty's (the A-Class) tend to head into economics. So that means that the righty's B-class is up against the lefty's A-class. It's pretty much always the case that when a right leaning political party gets into power, it's leader was a former member of a left leaning party. They often change parties because they realise that their current party is complete shit and will destroy their country.