A representative system could be worth considering, imho it'd be an ideal thing to test out the ID and trust systems on. There's likely to be a lot of proposals covering areas that few really give a damn about but someone they trust might and would let them decide on their behalf if given the option.
So another option could be that people getting paid from a proposal can't vote on it. I have mixed views here...Any owner of dash should be able to vote, but the vote will sway toward those that benefit. A more fair approach is just to bump the % to get over the hurdle of the I have enough node % to vote my proposal in.
This is a great idea, but unenforceable. Dash is an anonymous cryptocurrency, so we don't know who (person) is who (masternode).