In a speech to the NAACP, John McCain wrote:
First, how many Nobel Prize winners would want to teach in America’s public schools. I don’t think he realizes that this would be a serious pay cut for most Nobel Laureates.
Second, there is much more to be an effective teacher than simply having “knowledge, wisdom, and experience.” Nobel laureates are usually good for ribald seminars but I’m not certain I’d want them teaching my kids. And I don’t even have kids 😉