Have you studied them in other countries? I suggest you inspect your assumptions by looking at what already happens.
Voters want infinite "free" healthcare from their politicians, so healthcare costs continuously increase. You have little recourse to say no to taxes.
In New Zealand ~17% of government expenditure was on health in 2000 and in 2026 it was ~22%.
In NZD it went from ~$10B to ~$40B (inflation and demographics are also an influence).
Privately paid also exists, but only ~1/3 the spending of public health. NZ government ACC spending is also huge.
Government ownership does not fix the problems you wishfully hope it might.
Looks like surgical costs are similar when adjusted for GDP. The USA system isn't more expensive in comparison with the NZ system.
Replacement is free on the NZ public health system, but I've seen the painful years of waiting, the majority in my experience have to endure. A critical situation like my solo-mum friend who needed hips replaced was grossly delayed: hellish years trying to bring up her young children.
Statistics are very different from outcomes.