I'm facepalming so hard right now. I'm just going to chalk this up to "he doesn't know where his money even comes from."
You're like... an adult child. You have no idea how much it actually cost you to go to college.
The dollar value of a good college education depends on a choice of majors, and there would be naturally greater competition, too many students, departments bent on weeding out average or below performers.
There's also an intrinsic value, perhaps with a parallel in the intrinsic satisfaction of the job.
A student could pick a major with less promising income prospects, based on his idea of intrinsic value.
The costs:
Student fees
Tuition -- per credit-hour or other basis
Books -- an item that increased unreasonably over the last decade or so
Transportation, Housing, food and necessities
Unless you can find time to work part-time, you would figure in "loss-of-income" in some alternative job that didn't require any degree.
In 1937, Robert McNamara graduated from Berkeley, and from his account, he was paying $25/semester in tuition. In 1969, I graduated from another UC campus and was paying more like $150 to $200/quarter. [4 quarters = 3 semesters]. I think there was an autobiographical novel by Jack London, about being an oyster-pirate with academic or literary aspirations in a conflicted relationship with a bourgeois UC Berkeley student -- a novel about social class.
Today, it costs something in the order of $14,000/annum in tuition alone to attend my "alma mater." Wage opportunities would certainly vary: everything from Mcjobs to positions with greater promise and greater difficulty to obtain.
So, as goes the general US economy since the 1970s, wages have stagnated.
Do the math. Figure it out. We're talking about the University of California with this. You could get into Harvard, but could you afford Harvard?