I went to one of these schools. I don't claim any knowledge of current conditions, but the teaching (not all the work professors do) loads when I was there were absolutely insane. These were not cushy jobs.
..and, adding, as I've written before I'm almost 100% that my tutition+room+board (probably not extras like textbooks) came in at just under $5000 my freshman year. That'd be $9700 in today's money. Current price: $20,700, more than double. Just call me Old Economy Atrios.