It's pretty clear that the opinionists didn't actually read the studies they linked to, since at least one of the studies they cited to claim that single-payer would increase costs actually said single-payer would do the opposite, to the tune of a more than 8% reduction of 2017 amounts, which was before a number of health insurers jacked up their premiums just because they could. https://www.peri.umass.edu/media/k2/attachments/PollinZetZal...