Notes on Blockchain Governance
vitalik.ca
vitalik.ca
Very complete "here are the limitation, in the end, just don't be dumb" article.
About the bribing part: Could we get rid of it if voting is anonymous (I can't reward you with a bribe), and we give right to coins that haven't moved for a certain amount of time (I can't ask for your money and your account has to be "old enough") ?