Honestly, I imagine that wealth taxes would be difficult / cumbersome to actually implement in a fair way -- and they'd likely get significant challenges.
A more traditional approach, that I believe worked fairly well though I'm not totally sure, is to jack up inheritance taxes. Much easier to apply a tax on wealth during a wealth transfer, as all items get accounted for at the time anyhow.
Another approach that would likely dramatically shift things, would be to alter how stock market securities get used to secure loans: regulate banks to prevent them accepting securities at value. Doing that would turn off the 'tap' of money for many rich people, and instead force them to liquidate some capital to afford their high-service lifestyles. Ie. Cases like Musk, where you see the "richest man in the world" taking out loans using his stock as collateral in order to pay for stuff, shouldn't happen: make him actually sell his stock to raise liquidity.
so idk, i think there are options beyond just those two.
I dunno, I can't get quite as outraged over indirect deaths caused by essentially pulling back on charity to foreigners. It's about one step off from accusing western nations of being responsible for all the deaths in North Korea, just cause the west didn't directly intervene.
The general population of the USA is not that concerned with foreigners / international politics and issues. If the politics of the states is meant to reflect the will of the people, them opting to refocus their funding / efforts to domestic areas isn't that surprising or off brand.
Yes, other people, especially the prior beneficiaries of that charity, will view it as 'wrong'. But they're hardly an unbiased stakeholder. Like yes, this likely diminishes the USA's soft power globally... but the states doesn't really care about that anymore anyhow. Having a 'land' buffer zone between them and other geopolitical powers was beneficial in yester-years war dynamic. Now it may be much less important for them to maintain -- especially if the rest of those countries are so neutered that they can't realistically defend their own sovereignty, be it militarily, culturally, or otherwise.