Side note: when people complain about the military budget, projects like these should be noted. Political reality in America, today, is military R&D and jobs programs are easier to fund than civilian ones; so that’s where projects go to live.
I sincerely doubt our enormously bloated defense budget is because of research...
The US has one of the highest median incomes on earth. Now combine that with the large human force that the US military has. The bases, veterans, healthcare, various benefits, retirement, equipment for the humans, salaries, and on it goes.
For example missiles + munition costs are a mere 2% of the military budget. Shipbuilding and maritime systems is a mere 3%. Aircraft and related systems is 5.x%. R&D is about 9%.
The budget related to operating the bases, maintenance, salaries, benefits, vets, and all other related human costs = $500 billion.
There's a strong argument that if you adjust China's military spending to factor in the difference in income / per capita costs for human soldiers vs the US (basically PPP adjusted), that China outspends the US already (and that's with an economy 1/3 smaller):
https://www.bloomberg.com/view/articles/2018-05-25/china-out...