Not just to do the work, but also to do the dying.
Enlisting in the military is often a resort of financially destitute people who don't see many other options.
Well, among other things, like participating in mass murder.
I think it's pretty well known and understood. Not only a successful jobs program: a training/education one too, and the prime social ladder.
btw I'm not saying this is a good idea, I just wanted to make the point that there is plenty of money to pay for something like this.
Which is maybe why Bill Ackman's proposal here doesn't really make money accessible to working-age people, when they most need it to set up a less hairy lifestyle.
$250.9 billion for 2021, according to this article:
https://www.msn.com/en-us/news/politics/house-passes-2509-bi...
https://www.brookings.edu/policy2020/votervital/is-us-defens...
Also note that Brookings tends to lean pro-military so 15% is likely an under-representation.
If you remove mandatory spending it's more like 50%: https://prospect.org/economy/tax-dollars-really-go/
Napkin math: 4,000,000 babies per year in the USA * $6750 = $27 billion.
USA 2020 defense budget: $738 billion
So this would cost ~3.5% of the 2020 annual budget of the defense department.