It is a dangerous assumption to think it is the place for a parent to judge if their children should incur the equivalent of half a decades debt when they themselves may have no comprehension of the value of a degree their kid is thinking of.
At some point people have to be treated as adults. If your parents aren't up to advising you on financial matters you have to get outside help. Or you figure it out yourself.
I refuse to accept the notion we should alter agreements freely entered into by adults in an effort to protect them from themselves.
I agree you should not alter open agreements, but those agreements are already biased by federal dollars in the form of guaranteed stafford loans. We need to get rid of federal loan and grant guarantees that are not merit based limited funding that happens after acceptance (so that schools can't focus target anyone getting a federal scholarship).
Imagine if you went to the local car dealer and he told you "Every car on the lot is $200k. But give me a detailed listing of your assets and income and I'll adjust the price such that you can barely afford to buy one if you take out as much financing as possible."
That kind of price discrimination is illegal for your local car dealer, but it's exactly what happens when your kid goes off to college. Not only that, colleges collude so that you can't play one college off against another.
Of course what they say is they're just making sure they have a "diverse" student body by cutting the less well off students a deal. But the net effect is the college takes in the maximum amount of money in tuition.
It's the biggest driver of ever-rising tuition, and were I in Congress I'd go on the freakin' warpath against this industry.