Each school has its own maximum based on many factors. What is your point? Should anyone be able to set up a med school and pump out unqualified docs? And as explained several times- med school is not the problem. No one wants to be a primary care doc. The pay is shit compared with specialists. Also, another reason for the shortage is lack of funding for residency spots.
http://online.wsj.com/article/SB1000...528424238.html
http://www.washingtonpost.com/busine...Q4Q_story.html
Two good articles that help explain the problems.