[s1artibartfast]

There is a fair bit of data on this and most of the difference is around prohibiting of private supplemental insurance.

Medicare is generally understood to work with supplemental insurance. Single Payer is often marketed as a prohibiting supplemental insurance.

The whole topic is disgusting, particularly the rejection of opt-in Medicare at cost by both sides.

This rejection is hypocritical to everything either party claims to stand for.