What about the 178 million people who currently have employer-sponsored health insurance and overwhelmingly like it? What about the sticker shock awaiting individuals and employers over the tax increases necessary to pay for such a program? What happens if hospitals go bankrupt because Medicare reimburses at much lower rates than private insurance? Would the government step in and run them, as is the case in Britain?

And most important, how do you actually pay for this enormous, multi-trillion-dollar overhaul? (Is Mexico paying?) Given Americans’ allergy to higher taxes, it’s not enough to dismiss fiscal concerns by assuming Americans will gladly give Uncle Sam the money they currently earmark for a private health insurance system.

On this and other major questions, the Sanders plan punts.