Success of this would ultimately depend on the people running wikipedia, they can reverse any changes in a blink of the eye and ruin all your effort. The least you will be dragged into endless discussion about changes you have made. I think it's not bad idea but one should be aware that success of it is uncertain.
Meanwhile people can focus on the alternative sources like,
http://www.metapedia.org/
http://en.metapedia.org/wiki/Main_Page
Creating the knowledge base there and slowly incorporating it to main, mainstream wikipedia.