Actually, this is precisely what they are not teaching in economics: That people are weak, stupid, and make mistakes. Instead it teaches that they are informed,

Actually, this is precisely what they are not teaching in economics: That people are weak, stupid, and make mistakes. Instead it teaches that they are informed, rational decision-makers who carefully weigh their options and choose the one that maximizes "expected utility". Schmoo! This is why we are in this mess!