This is a bit of a tough thing to say, I would say that any politician can find a way to be corrupt while using any sort of currency. If Bitcoin was the currency of this country, then you'd just find politicians using different addresses and having coins mixed at a crazy rate. They would find a way to get away with it, it's crazy to think that Bitcoin would rid the world of their greed problems. The only reason that Bitcoin will never be allowed to thrive is the fact that banks, politicans, governments, and so on and so forth don't want to give up their power to a decentralized coin, and that is the ONLY REASON.