Have you gone to college in America? Did you hang out with somebody outside of Science and Mathematics departments? Plenty of people go to college here just for the fun experience. They go there for the bars, fraternity/sorority parties, sex, drugs, alcohol, etc. They don't have a single care in the world about what happens after college. They don't really care what it costs because they don't pay it. One way or the other.

To summarize, it wouldn't be about purposefully defrauding the taxpayers. It's just that that thought would never even come up.