Corporate vs. Government Organizational Behavior

Since I have started my MBA interesting topics have come up for me. As most of you know, I work for the Federal Govt. as a DoD employee. My question: Since DoD is not "profit" oriented, what kind of organizational change would affect its ability to become more efficient? One theory I have, is that the only change that could assist in capturing efficiencies that private sector companies enjoy, would be to minimize the effects of political change. How is the million dollar question.