That's the incredulous question posed, in passing, over at The Weekly Standard's blog. And it's a good question! After all, Robert Gibbs' salary is more than three times the median household income of an American family.
On the other hand, the Standard has a bit of a history of poo-poohing the idea that households with yearly incomes of $250,000 or more could be reasonably defined as "rich." So the Standard's standard is clear: If you're making hundreds of thousands of dollars a year, you're middle class -- unless you're a Democrat.