Dunno about paying. Remember Amazon Turk? Folks just spammed it with zero-effort submissions and 'closed' thousands of contracts with bots. Instantly gamed, so some jerk could walk off with thousands, $1 at a time.
The shaming idea, that could work.
The shaming idea, that could work.
I don't think it will work on the other more senior pool of expert reviewers. On the other hand, I think most of the really bad reviews come from this senior pool, so maybe that's fine.