Oh ya, Mitt, the epitome of a hard worker.
Looking at the man's resume, combined with the fact that he has run multiple political campaigns - including one for POTUS, which is no cake-walk - tells me the guy is a pretty hard worker.
I'm not going to comment on the "fairness" of the relative wages, but implying that a McDonald's employee and Mitt Romney are equally productive, or work equally hard, is nonsense regardless of your political stance.