The average salary of a professor at Stanford is $148,000. I think it's unfortunate that he had to step away from the possibility of influencing those who do make it to Stanford in favor of catering to the world. It's great that he does so, but there's also plenty of reasons why he would be affecting many different minds at Stanford.

[1] http://www.sfgate.com/cgi-bin/article.cgi?f=/c/a/2006/05/14/...