In a normal business, someone spending $20 for something that cost $10 to make would not decrease the availability for anyone else, because the company would be able to make two widgets for every one widget they bought.
There's already something very fishy about the university system that anyone who can pay more than they cost isn't let in. Why do admission slots even exist?
universities aren't aws nodes that can be instantly spun up to meet demand. it takes time (and possibly more land) to build new buildings and hire new teaching staff without compromising the quality of the education. the wealthiest institutions can afford to ignore ability to pay, but most need a certain fraction of their students to actually pay the full price.
Most exclusive schools have been exclusive for several generations. There's no way to explain the scarcity of seats at Harvard by saying "they haven't had time to recruit new professors."
There's already something very fishy about the university system that anyone who can pay more than they cost isn't let in. Why do admission slots even exist?