Such a plan in theory may generate societal savings but such savings would not pay for a program. Governments can only spend tax revenues and/or borrowings. This study does not say how one would pay for such a program in the real world. I note that Prof. Krugman like the concepts of such a plan in theory but notes that taxes will have to be raised a great deal to pay for such a plan
Back in 2016, here is his position Prof. Krugman compares Sanders hoped for health care savings to the GOP tax cuts. http://krugman.blogs.nytimes.com/2016/01/19/weakened-at-bernies/?_r=0
On health care: leave on one side the virtual impossibility of achieving single-payer. Beyond the politics, the Sanders “plan” isn’t just lacking in detail; as Ezra Klein notes, it both promises more comprehensive coverage than Medicare or for that matter single-payer systems in other countries, and assumes huge cost savings that are at best unlikely given that kind of generosity. This lets Sanders claim that he could make it work with much lower middle-class taxes than would probably be needed in practice.
To be harsh but accurate: the Sanders health plan looks a little bit like a standard Republican tax-cut plan, which relies on fantasies about huge supply-side effects to make the numbers supposedly add up. Only a little bit: after all, this is a plan seeking to provide health care, not lavish windfalls on the rich — and single-payer really does save money, whereas there’s no evidence that tax cuts deliver growth. Still, it’s not the kind of brave truth-telling the Sanders campaign pitch might have led you to expect.
Today, Prof. Krugman says that such a plan is feasible if you are willing to pay a great deal more in taxes
https://www.alternet.org/news-amp-politics/paul-krugman-explains-why-single-payer-health-care-entirely-achievable-us-and-how
If we went to government provision of all insurance, we’d pay more in taxes but less in premiums, and the overall burden of health spending would probably fall, because single-payer systems tend to be cheaper than market-based."
The amount of higher taxes are not quantified in this article by Krugman. To pay for any such plan will require massive tax hikes
Again sanders has utterly failed in his attempts to get Vermont to adopt his magical single payer plan because the state of Vermont cannot use hypothetical societal saving to pay for this plan. Even Krugman admits that much higher taxes are needed
Congratulations to our presumptive Democratic nominee, Joe Biden!
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