The huge numbers you see tossed around almost always include living expenses. "$120k for a state school!" sort of thing.
The failure in reporting is those living expenses would have been incurred regardless if the person attended university or not.
As a society, I think we need to encourage people to work at least part time, if not full time during university - and take a slower path toward their degree. The result will be more experienced, mature graduates that have had time to evaluate their future.
Also keep in mind the current system incentives - aid is inversely correlated with income and balances are forgiven in some cases. Why work harder if it means getting a worse deal? If one really wants it for "free" then there's always the military route.
It's often thought, incorrectly, that university teaches you how to do a certain job. People go to university to learn how to become an X.
University isn't supposed to teach you how to do a job... it's supposed to teach you how to think critically. Along the way you learn, in varying depth, knowledge about specific fields of study, but that's not the same as learning a job.
Recent graduates are often immature (barely 21, who can blame them), limited in both depth and breadth of knowledge, and inexperienced. Most new hires have to be trained within industry for at least several months if not longer before they become productive for any business/organization.
Having students work part time, or preferably full time jobs while attending university would be a net gain for all of the above.
Working a job teaches teamwork and responsibility. Employees gain life experience, learn skills (learning a skill is the point, not what the skill is), discipline, and how to interact with others professionally and maturely. Basically everything university is not capable of teaching.
Working a job is complementary to an education, under this idea. The notion that university should be completed in four years needs to change - maybe it should take 6-8 years after all. The quality of an average graduate would be immense, and future earning abilities would be equally increased.
"maybe it should take 6-8 years after all."
This has multiple negative economic effects, such as delaying family and decreasing g retirement savings compounding.
"The quality of an average graduate would be immense, and future earning abilities would be equally increased."
I highly doubt this. Without the qualifications to work in their field, they would likely have limited benefit. If they are able to work in their field without the knowledge gained in college, then we should do away with that requirement and move to apprenticeships.
The living arrangements are getting more expensive. My college tore down their old, low cost dorms. They replaced them with suites that cost twice as much.
In Australia for example college debt is managed through the taxation system allowing people to invest in the careers in the early days and then pay off their debt when their taxable income reaches a high enough threshold.