R and D, is one of the most expensive, and wasteful costs in the budget. Do some quick research on the F-35 project. The numbers are ridiculous. Factor in the cost of actually building the fighter, and maintenence over the next couple decades, and it gets beyond belief.
Don’t get me started on how much money the US gives lots of other countries, just so they can fly over their airspace, or use their airfields, or manipulate their resources.
Military is important. But the amount of money going into our military is crazy. Consider that some/much of the technology gets stolen by China, or hacked. The best strategy seems to be, wait for the US to figure it out, and steal it exponentially cheaper than doing it yourself.