I think you're overestimating the annual cost of school. I know it doesn't cost $25k/yr for me to go. I pay around $6k/yr for tuition, plus another $1k or so for books. According to College Board [1], that's about $1k less than the average for a student going to a public school, in-state.
Your figure matches about what it costs to go to a private school, but, from my experience, public schools are also more likely to give scholarships [2]. Even still, no one is forced to go to a private school.
[2]: I went to a private school my first year. It was around $30k/yr, but I was also given a scholarship that cut that price to around $18k/yr. Most of the people I met on campus also received scholarships of some sort as well.
The school I'm at costs ~ $55k per year in the end, and the grants I get bring it down to about $30ish, and my parents make not much more than $100k (by working a full time and a part time job each)
The public schools I applied to that weren't rolling-admission 5th year of highschool types ended up costing the same in the end, because they didn't give need-based aid, and their merit scholarships were not large for people who don't play sports.
Need based aid isn't really targeted towards people who's parents who make more than 100k (more than the national average).
Merit scholarships are easy to achieve, given that you are exceptional. But if you are middle class and not especially proficient, I do agree that you have one of the hardest college experiences in america.
It's unfair to use your public school costs as evidence because they are not comparable to his numbers. Here are the numbers across the board for all college students [1]:
Median: $9K
Mean: $26K
Also, if we were to put opportunity cost into the calculations (because you could work/work more if not going to school), it would quickly approach the $25K figure.
We both linked to the same article, so I'm well aware that my tuition costs are not what everyone else will experience.
A median of $9k is still less than half of what the GP used, and my cost of tuition is a lot closer to the average than the $25k the GP used.
Also, if we were to put opportunity cost into the calculations (because you could work/work more if not going to school), it would quickly approach the $25K figure.
Part of the cost is often borne by the government. For the purpose of identifying a bubble, you have to look at that cost, too--because the problem is too much aggregate investment in education, not that it's a bad deal for everyone.
Your figure matches about what it costs to go to a private school, but, from my experience, public schools are also more likely to give scholarships [2]. Even still, no one is forced to go to a private school.
[1]: http://www.collegeboard.com/student/pay/add-it-up/4494.html
[2]: I went to a private school my first year. It was around $30k/yr, but I was also given a scholarship that cut that price to around $18k/yr. Most of the people I met on campus also received scholarships of some sort as well.