I think that they help universities raise tuition as long as the projected lifetime income increase from going to college exceeds the cost of tuition. Which will just allow our unsustainable "tuition rises faster than inflation" trend to last a few more years before it falls apart.
Note that "projected lifetime income increase" is generally overestimated. What we do is compare average income of a college graduate with a high school graduate and attribute the difference to college. However people who could get through college likely would have made more than people who couldn't, even if they hadn't gone to college!
Its also backwards looking, obviously. In the boomer working years, colleges were very selective and a degree was a stealth IQ test along with socioeconomic group membership.
At this point the average IQ of a college grad is very close to 100. I guarantee that within the next 30 to 40 years someone will make the shocking discovery that the presence or absence of a degree has no influence on income, success, or happiness.
At that point the ponzi scheme of higher ed can collapse.
There's nothing wrong with designing and implementing an education system for the top 5% of society and the jobs that top 5% will likely have. There is a big problem with a marketing scam along the lines of every American is a temporarily inconvenienced millionaire.
Surely, my favorite waitress at Dennys is making more money as a waitress than she would as a K12 educator, if she could get hired, which she cannot. The degree does not make her a better person nor a better waitress. It does signal that she's in maybe the top 50% of humanity WRT the skills required to get a degree. She's a somewhat better than average person because of who she is, not a meaningless piece of paper for training she will never use. The point of discussing my favorite waitress is we need "something" to signal in the job market who is in the upper half of potential employees, and $100K of debt and four years of labor seem a huge waste on a civilizational level.
Note that "projected lifetime income increase" is generally overestimated. What we do is compare average income of a college graduate with a high school graduate and attribute the difference to college. However people who could get through college likely would have made more than people who couldn't, even if they hadn't gone to college!