re: How much would single payer cost?

All single payer will do is elevate 20% of the US population up and bring down the other 80%.

Then you will see a surge of private care facilities where those that can afford to pay their taxes and pay for better access/care (similar to the private school system)

Right now the us pay about 17-20% ( 20% GDP by 2025of our GDP on health care.

Right now we pay as a country 26% of our GDP in taxes. so if this is proportional, then you will pay another 75-80% more in taxes to fund single payer if current costs = single payer costs. But with "Free" access to health care you either see more straining the system, or the system slows down and has delays....unless you spend even more for personnel and facilities.

Not to mention, the sheer inefficiency/corruption losses trying to run a government program on this scale. 1/5 (and growing) of GDP now run 100% by one source....