Per Capita is what matters, not total population. Its not hard.
Per Capita we are much more dispersed as a population, much more unhealthy, have massive swaths of ghetto tax-sponges and parasites who will consume all of the resources unless there is massive rationing etc.
Not all countries that have single payer are a shining beacon of what others should do. There are a lot more factors involved.
Vermont, the whitest, and more lib state in the country tried to do it and realized it was fiscal lunacy.
We need to get our diabetes problems under countrol, get a lot of the fat land whale ghetto leeches working and moving, same w the wal-mart scooter crowd, etc. Our spending on health care is out of control also because we waste tons on end of life worthless procedures which we would have to ration, which i have no problem with, but we need to be honest about it.