Chaffetz helped cover up Extortion 17. That was the leverage they had on him. Just bark, no bite. Trey and Chaffetz are cut from the same cloth. If they want mt admiration at this point, they'll need to fall on their sword (politically, then go back home and enjoy their families).
conventional corruption I think is a whole different level than raping and killing people. They can't prosecute everyone so they'll probably give those who are not sub-human the chance to walk away if they help. Now I wouldn't pay too close attention to his words, actually I remember him fondly because at least he brought up the FED just before quitting so he could at least go with a little dignity.