A lot of things in the defense budget are things that people rely on.
None that are things that have to be covered under the defense budget. Most of the defense budget is for personnel and for war fighting machines (purchase and operation).
Food subsidies at one point were covered through the defense budget for example
I'm not aware of this being true in my lifetime if ever. Citation please.
The GPS cluster maintenance and upgrades are paid out of the defense budget.
Doesn't mean it has to remain that way. Wouldn't be hard to put that into the budget for NOAA or NASA or NTSB or the Commerce Dept.
Originally the US interstate system was a defense project, though it's now funded through gasoline taxes.
The money for it never came out of the defense budget. The project did have defense implications but it ultimately was a civilian project that has been used almost entirely for civilian uses and funded by non-military dollars.
The defense budget covers a lot more than just war machines.
Let's not pretend that war machines and the people that operate them don't account for the vast majority of military spending.
After all, the Internet got its start as a DARPA project.
Which has fuck-all to do with the fact that our current military budget is bloated far beyond any reasonable defense needs.