You said SHOULD. Yes, I absolutely agree that politicians (and I very intentionally do not call any names) should be criminally punished most harshly for abusing their position for personal enrichment or for some other egoistical goals. On the other hand, these are the people we, as totality of all voters, chose for their function. The main punishment for a politician in democracy should be the threat of losing next elections, not criminal prosecution. And of course, per definition, in every democracy every politician has a majority of citizens, who considers him stupid and in the hysterical environment of the current political life (hysterical for many more or less good reasons) such politician is not only opponent, but an enemy if not a traitor. There is an unfortunate tendency to convert this adversarial feeling into full blown hate and accusations of criminal misconduct.