Yes, that!Also, if you were in charge, would you change our strategy entirely? (e.g. cut back to 25% and not be concerned with being a supreme military power)
The problem is this. You could have a strategy that gave us 80% ability to respond to anything happening anywhere with full effectiveness and the ability to respond to the other 20% with 50% effectiveness until everything else was brought to bear. That would cost about 40% of what we spend now, at my wild guess.
We insist on having a strategy that allows us to respond to 99% of the worst possible situations all happening at the worst places and the worst timing (several simultaneously). It gets asymptotically more expensive as you go past that 80% mark, so it costs twice as much to go from 90% to 95% as it cost to go from 75% to 80%. You need massive excess capacity staged all over the world for everything.
I'm OK with us being at that 80% level, I don't think we would be much less safe than we are now. Everyone else in the world, including China and Russia, are quite a bit below that 80% level for defending their homeland and at the 10% level for worldwide force projection. But this is 'murica damn it and we have to be the best times 10!