I think a big part of the "politician" problem is that the people who want to be in government (in democratic countries) are politicians! These are not the sort of people you'd buy a second-hand car from. I htink it's a control-freak thing.

But how do you deal with evil governments? Is it worse to stand by and let them get on with it than to intervene by force? Either way, a lot of people are going to suffer. Maybe if enough of us went and lay down in front of the tanks it would stop them, but there's an awful lot of tanks.