A real logical system would be treating military service in their background as a negative for candidates. Let's face it they couldn't get into college/find a job so they went into the military. Dropping out of society for several years to be a hired gun for the federales? Not exactly the mark of a stable personality IMO.
Speaking only for myself, I enlisted specifically for the educational benefits so I
could pay for college once I seperated, and I hardly "dropped out of society" since I was stationed overseas and saw some pretty neat places. Experiences I wouldn't trade for anything else in the world. I think you have a slightly warped sense of military personnel overall; probably gleaned your opinions from playing Grand Theft Auto and thinking we're all like Republican Space Rangers or something. lol
PS: the pols like McCain, Webb, JFK, Kerry, etc., don't enlist. They recieve commissions, which means they already have a college education, which makes your point moot.