Student loan defaults are rising fast, according to figures released this week by the U.S. Department of Education. While much of the press coverage focused on defaults by students attending for-profit schools, defaults at state colleges and universities went up, too. The bad job market is a big factor: Unemployment in 2010 was 10.1 percent for people between the age of 25 to 34, and those numbers are even higher when you remove people above the age of 30.