I don't think the USA needs a drafting system (that is, recruiting people from a certain age, training them, having them do their duty for a while, then releasing them for future use), because America is in no immediate danger, and its army is an army of proffesionals (not to say they're any better than non-professional armies, simply that they get paid more).

So, no, this is a stupid idea. It would change the entire military system, and risk a few democratic values, for no good reason.