> but nobody is saying we won't have to significantly raise revenues to pay for it.

Actually I dislike this statement - the federal government will be collecting and disseminating a lot more money than it is today, but less money will come out of people's pockets. It is the case that taxes will go up, but "taxes + health insurance" today is more than "tax + health insurance" under medicare for all, the tax goes up, the health insurance becomes 0[1].

1. At least for primary care, it's highly probable that a lot of "extra" medical care wouldn't be captured like vision insurance, dental and pharma.