How to lower the cost of college.

The cost of a four year degree, even at our public universities, has gone up much even faster than medical care.  For many college graduates, their post-graduate pay does not justify the amount of student debt that they accumulated.
Similar to community colleges, our public four-year universities should offer certificate programs that focus on specific skills, take less time, and cost less.  The certificate should indicate that the student has specific specific skills that employers demand, without the extra classes, time and cost of a broad, liberal four year degree.  If desired, students could live on campus and gain some of the non-classroom experience and relationships  that colleges offer.  This could go a long way towards lowering the cost of college while providing a college education.