Princeton has had a similar rule since 2001. Their current number is $100k. 25% of students pay nothing to attend. [0]
[0] https://www.princeton.edu/news/2024/03/29/princeton-trustees... (go tigers)
[0] https://www.princeton.edu/news/2024/03/29/princeton-trustees... (go tigers)
(Median income by age rises sharply from 20->40, then flatlines... the median age of a mother is around 27?)