This is your incorrect premise. Wages aren't low "across the board" and the job outlook isn't poor "across the board". They are low/poor for jobs that have high supply and/or low demand. What you've basically said is that the supply of various degree holders has remained the same. But that doesn't mean demand hasn't changed because of globalization/automation/[whatever]ation. You can call it a canard until you're blue in the face, but how do you argue with:
Unemployment for arts: 10%
Unemployment for engineering: 7%
Unemployment for medical/health services: 4% [0]
Also, see the recent "Downward Ramp" article on the NYT [1].
[0] http://www.huffingtonpost.com/2013/06/19/unemployment-colleg...
[1] http://www.nytimes.com/2014/06/11/opinion/the-downward-ramp....
EDIT: BTW, I'm not saying the student loan/debt issue is not a problem. I definitely agree that it is.