That's the idea behind lambda school. Interesting podcast interview from Indie Hackers[1]. They only collect if your salary is above $55k if I recall correctly and there is a max amount that they take in total.

[1] https://www.indiehackers.com/podcast/046-austen-allred-of-la...

Universities would probably stop offering humanities and push kids to professional courses.

Question: Why would you want to obscure the real cost of college even further?

Just s/university/federal student loans currently. But that’s not really free.