Who watches the watchers?

I'm not a huge fan of George Will, but I thought this observation was brilliant:

[John McCain and the Media who applaud him] assume, simultaneously, the following two propositions:

Proof that incumbent politicians are highly susceptible to corruption is the fact that the government they control is shot through with it. Yet that government should be regarded as a disinterested arbiter, untainted by politics and therefore qualified to regulate the content, quantity and timing of speech in campaigns that determine who controls the government. In the language of McCain's Imus appearance, the government is very much not ``clean,'' but is so clean it can be trusted to regulate speech about itself.