At this point, these well-endowed universities are essentially Private Equity firms, each with a university hanging off the side as a minor, semi-profitable department within the firm.
Precicely this
Everything is a bank for the rich. The people who “invested” in the endowment would rather burn their money than let someone use it without getting a multiple return on it
Universities get ~40-50% of their funding from the government. Private equity doesn't quite fit.