I mean, it's double edged.
You've got folks in desperate poverty for whom enlistment is designed as a release valve.
But then you're being paid to crush people more desperate than you.
So do you want to be the half of lumpen labor paid to do the killing or the half that's being killed? I don't like the people doing the killing, but I can't blame from for not wanting to be on the other side of the barrel. There's no good choice to be made when you're in the bottom rung of the social order.
At the end of the day, what we really need is a mid level officer's revolt. Where is the American Chavez? Where is the American Gaddafi?