Honestly, the military would probably be the easiest place to cut it from. Now, I haven't been in the military, but I have multiple friends thats either where in, or are currently still in, and every single one of them that ever progressed past e5 have flat out told me if you just cut down on the waste in the military, not even completely eliminate it but just cut it down, you could cut the budget by 20% and literally nothing else would have to change.

Obviously this is all completely anecdotal, and I in no way know the answer as to how to solve the problem, but hearing it from so many people across 3 different branches tells me that it has to be bad.

Realistically, as long as we wish for things to continue to even function, I don't really see anywhere else that it's even viable to continue to cut spending, let alone a good idea. Homeless population that is continually growing, growing portion of people already food insecure, only a paycheck or two away from being without, an aging, ever more crumbling infrastructure system. Anywhere else you turn to try to cut something, you're either looking at mass Homeless/hunger, riots, or just flat out the whole house of cards inevitably coming down. Like, everything after the big 4 that you listed with Medicare, social security, debt interest, and the military, are all tiny percentages in the budget. Cuts on anything after those 4 would have to be such a massive portion of their spending to make a noticeable difference deficit wise they would fall apart. It's a shit sandwich no matter what way we look at it.