I've always been curious about who's winning the lionshare of the pie of these gluttonous institutions. Is it administrators? they're an easy scape goat. Does it fund more research, so presumably the PHDs and their research assistants?
They are an easy target, but I would argue justifiably so. My ( supposedly non-profit mind you ) university had a president, who paid himself a salary in line with regional bank's president; he was kicked out. Current one is paid less but still high 6 figures. And this is not some prestigious university, where you could reasonably argue he really, really deserves it, because he is running it so well.
I don't know a full answer, but I believe we can start with administrators and work our way through the system. Something has got to give. This system cannot stay as it currently exists.