Stan-
It occurs to me that an amusing future use of donations would be to give $1-5k grants to various notables, for the purpose of reviewing a small number of articles in their areas. Most would just do the work (or assign to a grad student) and move on, but if 1 in 10 got hooked, they could add a lot of valuable content.
The kind of people who charge $1-5k for a review usually don't have the time to "get hooked", or they already would be. It would be a total waste of money until we have a systematic internal peer review process. Many errors are so blatant that you don't need a Ph.D. to spot them. You just have to look for them. Typically, once a Wikipedia article gets above a certain length, only a minority of people working on the article has actually read the complete piece.
Regards,
Erik