Yes, there are sell-outs in every industry. Did I ever say economists are the only ones? The difference, of course, is that the natural sciences are real because their results are well-tested and technologically applied. So the fact that a biologist can sell out to a drug company doesn't mean the theory of natural selection is mere propaganda, because that theory has been well tested. Ditto for relativity, quantum mechanics, etc. And not so in economics or in the other social sciences, so their "theories" are more suspect. Again, I already explained that in some of my articles on economics.