It’s not necessarily that clean cut. Money saved today can easily be many times as much lost further down the road when factoring in long tail effects, and none of the cuts were given any such consideration. Even if the numbers were correct as of the time of posting, they could ultimately end up contributing to the deficit in the long run.
Exactly! A lot (most?) of this spending has very obvious multiplier effects.
Tax enforcement is a trivial and almost immediate example. Spending $X on compliance seems to recover about $5X in evaded taxes. On top of that, there are knock-on effects: if it becomes easier to cheat on your taxes, more people may cheat.
Vaccines and other forms of preventative healthcare fall into this bucket too. Even completely ignoring the moral aspect of letting people (mostly kids!) fall unnecessarily ill, it often makes economic sense to pay a little bit to avoid having to potentially pay much more down the road. One ER visit can cover a lot of flu or COVID vaccines; a few nights in the ICU even more.
Research grants are maybe less obvious, but they have a huge multiplier too: the human genome project had something like a $120x return(!). This is not just big breakthroughs, but also all the work along the way. A lot of grant money goes to training people or supports small businesses making their equipment. I saw an interesting article claiming that the Air Force essentially bootstrapped the use of more exotic materials: military contracts covered the initial investment in (e.g.,) machinery for working with titanium, and once those fixed costs are covered, it was feasible to dip a toe into the consumer space and see if there's demand. Thus, titanium golf drivers.
