You are making a basic assumption that they have challenging courses. Everything is so watered down now that you could easily make it through  4 years without too much effort. You can buy papers easily enough, hire tutors, sleep with the professor. Unfortunately, these universities are making huge wads of cash. Look at the student debt ratio--that is federally subsidized money that schools are exploiting and we are footing the bill for. Education has been turned into yet another consumer culture experience where the consumers rule the roost. Professors are discouraged from flunking students and from not making special accommodations for their 'experiences I have witnessed this firsthand and experienced pressure from the system not to flunk certain students. If you have enough clout you can get away with much.