The claim doesn’t seem right. We do spend far more on healthcare than other nations overall and our taxed spending on healthcare seems comparable to other rich nations like Japan, though that’s only a fraction of our total spending - most is private cost. Quick back of napkin math says taxes directly spend ~4k a year/capita on healthcare expenses, mostly Medicare, and single-payer systems tend to cost about ~6k total. Data is a little old. Correct me if I’m reading wrong.