To be a little more specific, schools take a cut (often called overhead) of awarded grant money to pay admin salaries among other things - sometimes in excess of 50%!

These rates have grown universally over time and the practice is obvs not popular amongst the actual researchers/PIs.

It’s different kind of risk when failure means you may not eat or become homeless.

The rich do not incur that kind of risk when they engage in “entrepreneurial-ship”