Who but the self serving would want to be a politician? Maybe an airhead unicorn herder?
The system and economy is so screwed up it's doomed. Who want to be handed the helm of a Titanic as it surges at maximum speed through an ice pack?
A total failure of reality education.
I believe that many politicians start out with an altruistic motive. I think deep cynicism, the lust for power and a desire to stay in the job no matter what corrupts all of them at some point.