I'm not Burt, but at the most basic level the solider who joins for what ever reason is there because they wanted to be. The draftee is there because they have to be.
I enlisted during the southeast Asia fiasco, but most of the lads I served with were draftees. There was absolutely no way to distinguish between a "US" (the service number prefix for a draftee) and an "RA" (the prefix for an enlistee) on the basis of skill, motivation, or ability. Some of the best soldiers were draftees, and some of the worst were enlistees.
Look at the make-up of the force we have in Iraq now. It's not all regular army. It's not even all regular army plus army reserve. It's both of those PLUS NATIONAL GUARD. There's a whole lot of National Guard troops and a significant number of Army Reserve troops who are damned unhappy to be where they are, because when they were recruited the "sell" was on getting college paid for, not having to actually go out and get shot at.
Do really think some dork National Guardsman who signed up for the Guard because he never thought he'd have to fight is a better foxhole mate than a draftee who grew up knowing that he would be drafted? I don't. I'd rather have a fully trained draftee, who went through the same training I went through, beside me in a firefight than a weekend warrior who might ... or might not ... have shown up on the weekend someone showed them how to shoot a rifle. (Yeah, that's a bit of an exaggeration, I know NG types have to go thru Basic Training. The problem is whether or not they develop any proficiency, and if they do whether or not they maintain it.)
Our military is dreadfully, horribly, frighteningly under strength right now. Anyone who thinks we're going to triple or quadruple the size of our armed forces by enlistment is smoking some serious stuff, 'cause it ain't gonna happen. The draft will be reinstituted. It has to be, whether or not you like it. There is no other way we're going to achieve the numbers necessary to sustain our activities on the number of fronts we have open. Between stop loss and other little games, they're pushing the troops we have much too hard. Even at the height of the Vietnam "conflict," a full tour was one year. You could volunteer to stay another year if you wanted, not nobody was required to serve more than one year in-country. We already have troops in Iraq who have served their year and not been allowed to leave. Do you honestly believe those are happy campers? Many of them feel -- rightly, IMHO -- that they've been screwed by the system. They're not likely to re-up.
Now that it's common knowledge that the National Guard isn't the "safe haven" it was previously viewed as, do you honestly think people are going to be lining up in droves to enlist in the Guard? I don't think so.
So where are the troops going to come from to replace the ones currently in Iraq and Afghanistan when we do finally let them rotate out of Mesopotamia (as Jeff Cooper calls it)? I don't see any way to do it without a draft.
Disagree all you want, but that's the way I see it. But whether or not you agree, DON'T BE DISSING THE GRUNTS WHO WENT TO VIETNAM WHEN CALLED!