We already spend a lot on healthcare as it is, more so here in the USA than in countries with universal healthcare. Should we go from spending 17.7% of our GDP to 30%? Just because some people aren’t interested getting a vaccine?

The USA doesn't spend the amount it does on healthcare out of necessity, it does it because of graft. If we're willing to spend twice as much as everyone else for no reason, why not four times as much?

So? If healthcare needs rise, what is to assume that the graft won’t rise with it? The same people against vaccines are also against universal healthcare (at least in the states), so these problems will just keep being compounded.