“. . . Schultz’s argument—heard for years from centrist Democrats and Republicans. . . .”
Why on earth are we still calling members of the Democratic party who support Republican and other right-wing policies “centrist”? The Republican party in the US today is far to the right (not “conservative,” but “authoritarian” or “royalist” or “tyrannical”–look up the history of the term “right wing”) of where that party was in 1960, and if the Democratic party today is not also to the right of where the Republican party was in 1960 it’s mostly in a narrow spread around that point.
Single-payer was leftist 60 years ago, but on the world stage today it is centrist, as most of what Sanders advocates is. While most of the developed countries (i.e., industrialized) and many others have moved to the left since the end of World War II (with the UK and Germany notoriously schizoid on that point), the US has swerved sharply to the right. Mr. Schultz (“bless his heart,” as we say in the South) is abysmally ignorant of how single-payer works, why every civilized nation has some form of it, and why the only obstacle to instituting it in the US is ignorant ideologues like him. THIS is what makes “America” “exceptional.”