Been thinking about this too.
Wikipedia is great for some things, but still prone to the political bias of editors. Some better game theory is needed to keep them honest & neutral.
Zaps / micropayments provide a possible incentive, but the danger of a simple zap reward (~ single upvote) is that it may encourage political populism on one side or other ("Trump/Biden is a dork" would likely get millions of partisan zaps).
Some kind of net up/down vote might be better - but this still fails to achieve balance on Reddit. Might work better on Wikipedia, though, given that it's not so divided into sub-communities?