As a point of reference for what the Army personnel system currently produces, it is nowhere geared towards producing leaders that have an incentive to attend advanced civilian schooling. Despite the press that Petraeus, McMaster, Chiarelli, etc. have garnered for their graduate schooling, they are the exception that chose to do something outside the normal career path and were probably told by many that they were wasting their time.

http://www.strategicstudiesinstitute...les/PUB731.pdf

As for the comment that the social science degrees cannot be tested in the real world, I think it is fair to say that someone like GEN Petraeus performed better than LTG Odierno did back in 2003 when it came time to test what advantage a degree could provide. While theoretical, having a framework to be able to fit the real world into to try and make sense out of events is better than nothing, plus having the critical thinking skills to be able to approach a problem from multiple angles.