Harvard, MIT and Stanford are schools with enormous endowments with generous aid packages that are already very inexpensive for students even if your parents make 6 figures. However most students are already priced out of those schools given how competitive they are.

The top and even top middle school (probably every school outside HYPS) would either lower in cost or dramatically cut class sizes. There is a small number of students who’s parents can actually afford the 50k sticker price - either prices drop or these colleges end their undergrad programs. These institutions will not cost 50k/semester.