You do realize that there are many governments spending less on healthcare than the US that do have universal healthcare, right? And I mean that as a percent of GDP rather than a flat figure per person and that’s NOT counting insurance and out of pocket spending for the US. The US government already spends a fucktonne of money on it.

You don’t need to increase taxes significantly to pay for it. Might not need to do it at all. A neat side effect of poor people having access to healthcare is that they’re healthier and can work, meaning they also pay tax.