It's possible Medicare for All could both raise taxes and lower costs. + explain
How much would it cost to pay for Medicare for all? It depends how you look at it. The explains how adopting it could require substantial tax increases and leave many or most American families better off financially.
We take a closer look at the fiscal impact of Medicare for all.
My guesstimate of how much a payroll tax to pat for Medicare for all 25-30% was fairly accurate aka a more than doubling of existing middle class taxes: "Medicare for all could be financed with a new 32 percent payroll tax, on top of existing rates"