Glenn Harlan Reynolds has an excellent piece on the college bubble in the Washington Examiner:
In our grandparents' day, a college diploma nearly guaranteed a decent job. Now, not so much: "One of the greatest changes is that a college degree is no longer the guarantor of a middle-class existence. Until the early 1970s, less than 11 percent of the adult population graduated from college, and most of them could get a decent job. Today nearly a third have college degrees, and a higher percentage of them graduated from non-elite schools. A bachelor's degree on its own no longer conveys intelligence and capability." This is a simple case of inflation: When you artificially pump up the supply of something (whether it's currency or diplomas), the value drops. The reason why a bachelor's degree on its own no longer conveys intelligence and capability is that the government decided that as many people as possible should have bachelor's degrees. There's something of a pattern here. The government decides to try to increase the middle class by subsidizing things that middle class people have: If middle class people go to college and own homes, then surely if more people go to college and own homes, we'll have more middle class people.
Whole thing here.