There are a few problems that need to be dealt with. First is that "Reality has a well-known liberal bias". Which means lots of people want a "neutral point of view" which reflects their own opinion. Secondly, there are lots of trolls and bad-faith actors. So a bureaucracy needs to be built up to deal with it in a structured and consistent (not necessarily fair) way. Thirdly, what can incentivise people? Most editors…
Not sure what you mean by that. Corruption exists with or without paid labor, and I cannot for the life or me think how paying the people who do the lion's share of work at Wikipedia would increase the corruption there. Can you explain what you mean?