It's extremely rare to find a politician who will do what is right. The vast majority of them will only do what is in their personal best interest. The political world, especially in Washington DC, corrupts even the most honest. Working-class freshmen Congress critters soon discover how easy it is to become millionaires within a year or so; the next thing you know, those pesky constituents back home are at the bottom of their priority list. Nice big homes with fancy security fences like Paul Ryan's get built, and highly-paid aides keep those smelly home-town people at arms length.
The only way to get their attention is via their keisters: make it hot, and they start to listen. Sometimes even that doesn't work, and they have to be Cantorized.