I cant wait to pay for that with my tax dollars.

Tax dollars really don't pay for things in the US Federal Government.

Deficit spending leading to an ever rising debt is the source of continued spending. When Debt/GDP grows, we're spending ever more money that we don't have.

Total Debt:

https://fred.stlouisfed.org/series/GFDEBTN

Total Debt/GDP

https://fred.stlouisfed.org/series/GFDEGDQ188S

Then why have tax at all?

Answer to that is indeed this is tax expenditure.

Although rounding error compared to the war.

You're not wrong, but exorbitant deficit spending has its own dire consequences. (eventually) Not that I am telling you anything you don't already know.

What if we just inflate away the debt? Sure, ppl will hate dealing with very high inflation for a few years, and pensioners and whoever buys those trillions of debt will get screwed, but besides that we should be ok?

/s