Stupidest wonk on the face of the earth. Evil, too.
Ironically, bringing ObamaCare to Medicare is an obvious long-term compromise on health care [Oh, good]. If Republicans can make their peace with the [Heritage Foundation-authored] Affordable Care Act and help figure out how to make the Affordable Care Act's exchanges work to control costs and improve quality [and if weasels fly out of my butt, because that's exactly what a profit-driven system cannot do], it'd be natural [in Versailles] to eventually migrate Medicaid and Medicare into the system [thereby gutting two single payer systems]. Liberals would like that because it'd mean better care for Medicaid beneficiaries [prove it] and less fragmentation in the health-care system [see under "mess of pottage, sell birthright for"]. Conservatives would like it because it'd break the two largest single-payer health-care systems in America and turn their beneficiaries into consumers [meaning that liberals get a hypothetical outcome, and conservatives get a known one]. But the implementation and success of the Affordable Care Act is a necessary precondition to any compromise of this sort. You can't transform Medicaid and Medicare until you've proven that what you're transforming them into is better [yes, you can. You just loot them]. Only the Affordable Care Act has the potential to do that [also, too, single payer experiments in the states, like VT, which you just wrote off, YOU PUTZ].
Oh, and the evil part--
From an ethical standpoint -- follow me closely, here, young Ezra -- this prescription is a gigantic medical experiment on the health of the American people, and, given the policy discussions that censored single payer, performed on them without their informed consent. Any doctor knows that's unethical.
Ezra is recommending a procedure, which is known not to work, and not recommending a procedure that is known to work, and as an experiment. Why? Nothing to do with health outcomes at all. Rather, Ezra's experiment is being done, and at the expense of a statistically certain number of deaths, to see whether the doubling down on the neo-liberal solution of project of putting rentiers at the center of all human relations will work in health care, when anybody who looks at the data knows it does not. That really is evil.
NOTE Yeah, the headline: Wonkbook: Is Obama secretly the greatest Republican ever? Some of us would quarrel with "secretly," but yeah. And kudos to VastLeft for propagating that meme starting, oh, a year or so ago.