I am really curious why you wouldn't worry about being basically defenseless? If you dismantled everything, how would you defend yourself as individuals against the potential aggression of nation states?
Again, I am not arguing for this extreme, because I'd be perfectly content with the wind down already being discussed within this thread. However, I do not not believe:
1) A United States without a military is 'defenseless' given our
a) naturally defensive geography
b) a massive, armed population
c) the logistical difficultly of mounting a sustained attack given a and b
2) Furthermore, I do not believe a demilitarized US will be a 'instant target', since we'd also be removing our troops from around the world. Why risk waking a 'sleeping giant' by attacking us? Why risk destroying their own economy?
3) It would be much easier for a nation like China to absolutely destroy our economy than mount a physical attack. This is true now, even with a massive military, but would still be true even if demilitarized. To put it clearly: I do not believe any nation capable of attacking us would attack us when there are significantly better alternatives.
4) Troop buildup creates a ripple effect. For example, if we placed 500k troops on the Mexico border, as TC seems to suggest, it would force Mexico to similarly build up along that border for their own defense against us. In fact, they'd likely need to double the size of their own military just to handle this new 'threat'.
Basically, I just don't think, as several have claimed here, that we will be attacked the second we look 'weak'. I think that's an absurd concept, in fact. The most likely reason we will be attacked is due to our own never ending aggression.
I mean, let's say China demilitarized tomorrow. Would we attack them because they're 'weak'? I don't think we would, at least, I hope not, because if so we've become a terrible people. And no small nation would even consider it, since they'd wake the giant and get slapped down.
But again, I'm perfectly happy with a defensive navy and air force, and small group of 'trainers', plus general militias, etc.