On what planet have you spent the last four years? Bernie was more than willing to talk about "HoW wE gUn PaY 4 It?!?!?", he did at exorbitant length and excruciating detail. Repeatedly. And every think tank left of Heritage Foundation all agree, it's cheaper overall while actually pushing for-profit insurers out of the market and at less cost to the consumer.
It's dead simple: nominal FICA increase and remove the FICA cap, nominal income tax increase by income bracket and changing capital gains taxation to reflect income taxation, eliminate tax shelters and subsidies for private insurers. That pays entirely for M4A to the penny
while still being revenue-positive for lower- and middle-income taxpayers, because
lower- and middle-income taxpayers are no longer financially liable for premiums, deductibles, and copays. In other words, yes, consumers pay more in taxes, but they pay less for health care, and the savings in health care costs are more than the tax increase.
There's literally a
whole-damn-ass word document on his page about it.
Blame neoliberal news outlets for refusing to report on the cost of M4A honestly and relying on dishonest scare tactics, while health care-funded propaganda machines destroyed the signal to noise ratio, by erroneously inflating "da troo cawst" of M4A with absolute bullshit figures and screaming "yer tax gun go up!" while ignoring the cost savings to consumers.
EDIT: And here's the absolute rock-bottom line on it. It's supported by 90% of Democratic voters. If Democrats are unwilling or incapable of adopting a plank supported by nine-tenths of its own party because it makes donors sad, fuck 'em. What is the point of a political party if it will not actually endorse and represent the policy positions of its own voters?