"Companies that perform studies and analysis for organizations like TRADOC are usually small and specialized, and generally aren't involved on the acquisition side."

Details aside because my example in the post you were responding to is real, the company doing the study is not small, and while it has a specialized analytical branch, evidently, it is heavily involved on the acquisitions side. Again, rational business behavior. Major defense contractors have the influence and economies of scale to operate more efficiently in all modes of defense contracting, plus when they branch out into analysis, they're helping their own cause out. While it may not be direct influence, as I do not know the ethical and legal obligations of fencing off such a study from the other branches of the company, they are at a minimum gaining insight into where DoD is looking for change and can clue their other branches to look for marketable activities there.