Yes, but the two groups exist and are adapted to two totally different environments. I imagine that some in the well off population see the others as a different species. Thusly, strict Darwinism doesn't apply here.

To truly see who is more fit, I propose that we take a group of 12, 6 from each class, and drop them off on an uninhabited island. We will places weapons and traps at strategic locations. We shall call this experiment Project Craving Romp.