Basically this. The only way to achieve this is massive manpower cuts.
I have a few ideas where we could cut less drastically over time.
Manpower cuts, to what exactly? Should we cut 1 of the 3 Marine Divisions? Should we cut half of the only Armored Division we have left? Cur 2 of the 5 Air Defense Brigades we have?
And guess what? This is exactly what was done in the early 1990's. All this did was create the need to increase the number of civilians and contractors needed because a great many jobs still have to be done, if the military does it or not. The number of chow halls on each base will still likely not change, but since there are less people to work them that is what has led to most of them today being run and manned primarily by civilians. Not enough people to do the job anymore, but it still needs to be done.
And there is a limit to how far you can shrink the military, until we are about as intimidating as France.
Here is a good example. In 1982, the US military was 2.1 million. And for all the talk during that era of the "Reagan build-up", at it's height during his administration the military only hit a high of 2.17 million in 1987.
In 1993, we saw those numbers shrink a lot though. From 1.8 million when the Cold War ended, to as low as 1.3 million in 2001. That was the era of a lot of the jobs being turned over to contractors, because they still needed to be done.
And the highest numbers in the military since 9-11? Well, that would be 1.43 million, way back in 2010. Today, the total is 1.35 million.
So how much further should the manpower shrink? We are already once again seeing Reserves and National Guard being activated more and more often to fulfill the needs of the country. My last unit has actually had at least 1/3 of it's personnel active in one country or another for over 5 years now. Literally as soon as one group returns, another one leaves. And they are about to stand down from that mission next year, and move to one that will be less of an always active operation, but they will be responding to almost any emergency that pops up that the DoD thinks they can handle.