Your son can’t borrow $80k; he can only borrow ~$5500/year or ~$27k total. Unless you cosign loans for him, he can’t get into that kind of debt.
I’ve heard very few people say their kid thinks they, or the world, “owes them a free ride” to college. Most are trying to find a college that can be paid for with a combination of merit aid, money from current earnings, savings, student work earnings, the AOTC, need based grants (if they can get them), and the federal student loan.
If parents shouldn’t have to pay for their kids to go to college, and the rest of the world (the government, college, and other taxpayers) shouldn’t have to pay, where exactly is the money for college supposed to come from? The only group left is the students. But students can’t afford to pay the $20k-$70k/year it currently costs to go to college. Changing the system so only the student’s income is considered won’t make the cost of college any cheaper. Those families who can pay for their kids will still do so. The ones who can’t will have to send their kids to cc or the local commuter college like just about everybody else.