A “perfect” voting system: “[...]
1. MPs run as they currently do – a smallish number of candidates stand for a single constituency
2. People cast a vote as they currently do – each selects a single candidate to cast their vote for
3. Once all of the votes have been cast, you pick one voter at random and use their choice
4. Wait, what? [...]“

http://www.drmaciver.com/2011/04/a-perfect-voting-system/

Cf. http://news.ycombinator.com/item?id=2484677