The US spends more per capita, and even as a share of GDP, on healthcare out of public funds than some advanced industrialized states that have universal systems, as well as spending even more on healthcare out of private funds than out of public funds. If we didn’t have a system which expended vast quantities of additional resources in order to assure that a substantial subset of the population is denied needed healthcare and instead just provided the needed healthcare, we could fund all those other things without cutting back on the war crimes, crimes against humanity, and crimes against peace, either direct or those that we subsidize that are executed by other regimes.

We still should cut down (ideally to zero) on war crimes, crimes against humanity, and crimes against peace, but the reason is because those things are unqualified evil on their own, not because doing so is necessary to fund healthcare and other priorities, which it very much is not.