One of the core narratives of the Soviet Union’s fall seems to be this: terrified of a mliitary threat presented by their enemies, they neglected their economy in order to pump all their resources into a military buildup. Eventually their economy couldn’t sustain the pressure, and the Soviet Union collapsed. (References for this narrative upon request–I think it’s fairly common knowledge).
That narrative may be problematic–some folks think the Soviet Union would have collapsed even without Reagan’s wild-eyed military threats, for example.
However, I can think of a country in modern times that devotes a tremendous portion of its GDP to its military, resulting in a military budget bigger than the rest of the world’s militaries combined, with one of the highest military budgets as percentage of GDP in the world (and IIRC the highest if you exclude dictatorships and nations fighting wars on their own soil). And this country is facing a serious threat to its fiscal welfare, and is destroying its own infrastructure in order to maintain its huge level of military spending.
Is this parallel valid? It seems to me that if we cut our defense budget by 75%, we’d still be among the biggest militaries in the world, and our military would be unquestionably big enough to defend our borders from any conceivable threat long enough for us to build up to a larger force if necessary (as we did during WWII); that budget-cut would save about half a trillion dollars a year, eclipsing anything that the supposedly fiscally-responsible Tea Partiers have proposed. This might be what we need to do if we’re serious about ending our budget deficits.
Yes, there would be trade-offs. Our European allies might well need to expand their militaries to compensate. I say it would be worth it.
Otherwise, we might be approaching our own less salutary 1991.