Wikipedia and DrKW Wiki Case

How do Wikipedia’s processes for creating and modifying articles ever lead to high-quality results?

I believe this can best be explained by the following quote from Jimmy Wales, the founder of Wikipedia:

“The wiki model is different because it gives you an incentive when you’re writing. If you write something that annoys other people, it’s just going to be deleted. So if you want your writing to survive, you really have to strive to be cooperative and helpful.”

Wikipedia’s processes allow anybody (except for non-registered and new users) to edit, modify, delete, and restore text within articles. This allows for an open community of users where all users are essentially given the same privileges and thus, have equal rights regarding content. With an open model, people worry about graffiti, deletion, and accuracy of the information. However, these worries are addressed by the underlying fundamental element of Wikipedia: people actually use it because as a whole, they have a need for a free accurate online encyclopedia. The proof is in the pudding: the fact that millions of articles have been written by thousands of users, demonstrates that people use Wikipedia, that it works, and that there is a bone-fide need for it. Therefore, as long as people, as a whole, see value in the service, they will continue to use it and will monitor the accuracy of the content, for it is only useful to them when it contains accurate information (i.e. it is self-serving). Ultimately, it is a self-serving community that has incentives to keep it useful for its users and will therefore contribute, add value, and protect it.