You’re overthinking the issue, I’d suggest.
The gating point is if the proposal eliminates private insurance through employers.
That’s difficult, because Medicare (as it currently exists today) is not as comprehensive as private insurance through employers, for MOST employed workers. So, for at least half of the Americans of working age, Sanders is offering something that’s not as good as what they have today, IF it’s actually a Medicare extension to the broad population.
And, if it’s NOT merely an extension to the broad population, then the price tag is out of sight, not because of large corporate interests, but (as Sanders has himself admitted) because we pay our health care professionals (doctors, nurses, orderlies, and med technicians) approximately double what they get paid in the rest of the developed world.
And, as we’ve seen in the past, public support can easily flip on a proposal when the CBO releases its cost analysis.
What’s odd about this debate is that the goal of the M4A people is NOT “cover 100% of America”. The goal of the M4A people is “cover 100% of America UNDER THE SAME PLAN.”
Why? Who cares, as long as America is covered. Only 10% of America lacks insurance today, so fix the ACA to get to 100%.
Easy, peasy, cheaper.