We need more Nobel prize winners in politics. They seem to be more honest, more caring for the greater good, etc., and thus more fit for the job (I know, right now it seems the opposite is true). And in case they lack all these characteristics, at least they pushed the boundary of knowledge.

Perhaps this is unrealistic, but we could increase the admission requirements of politicians. First show that you care about more than just yourself for at least a decade or so, and then you may decide about the fate of millions of citizens, their offspring and planet Earth.