
In the US, we already spend about 60% of our taxxes on entitlement programs like social security, SNAP, disability, etc… A close relative of ours, Canada, spends about 40% of their taxpayer money on healthcare (mostly universal healthcare right) so it would be tough, many countries that have these healthcare systems still rely on the US for military protection and US consumers aswell
These are good points, I would argue that a tax increase on the ultra wealthy would be required then. Also, you could eliminate dense insurance bureaucracy and save money as well. This is something the Trump administration could have done rather than cancel a bunch of foreign aid grants, though actually doing a comprehensive review of those would save money as well for us to spend here