I was joking about your physics courses sucking. They're definitely different if history and economics are more work than physics, though.
I don't think quality of the professor should necessarily dictate the quality of the course. I spend about 80% of the time with the work associated with my Physics course away from the lecture professor. He doesn't even have an overruling voice when creating the curriculum.
That aside, the professors that I have for Physics have two votes... I don't see how that's much of an objective measure of course quality.