Bitcoin is "one of the most corruptible tools in the world" only because it's valuable but not regulated like banking. The problems lie in the inadequate infrastructure around its use, which wouldn't transfer to voting. The important thing about voting protocols is that you don't need a chain of custody you can trust; you can tally the votes yourself, and verify which camp you were counted toward. That said, using a bitcoin-like protocol for voting is serious Golden Hammer Syndrome. There's no need for a protocol intended to solve the Byzantine Generals Problem and to allow for sending arbitrary balances that can be respent, not to mention numerous other complex features worse than useless for voting. What we'd want is something much simpler (easier to audit), like blind token exchange with a central server.