Matthew Yglesias says, with tongue firmly implanted in cheek:
Academics have real jobs and will only perform the great public service of blogging about what they know if they happen to be egomaniacs. Think tankers and other such people one encounters here in DC, on the other hand, really are just being paid to disseminate ideas throughout the world.
Whuh? You mean academics aren't being paid to disseminate ideas throughout the world? Then why are we writing all these papers? Why are we teaching all these classes?
But, yeah, the egomaniac thing, that's right on.