John Harwood: One of the constraints has been fiscal. Senator Warren is producing plans to pay for Medicare-for-all. You’ve identified revenue sources for about half of it. Do you think it’s important to identify revenue sources for the other half? Or do you believe, as those who subscribe to modern monetary theory believe, that we’ve been a little bit too constrained by concerns about the deficit?

Bernie Sanders: We’re trying to pay for the damn thing. At a time of massive income and wealth inequality, it is my view that the wealthiest people in this country, the top 1/10th of 1% should be paying substantially more than they’re paying right now. You have an insane situation. Let my Wall Street friends there tell me why it makes sense. …

John Harwood: But you still have more revenue to go to make it fully paid for, yes?

Bernie Sanders: The fight right now is to get the American people to understand that we’re spending twice as much per capita, that of course, we can pay for it. We’re paying it now in a very reactionary, regressive way. I want to pay for it in a progressive way.

You’re asking me to come up with an exact detailed plan of how every American — how much you’re going to pay more in taxes, how much I’m going to pay. I don’t think I have to do that right now.

John Harwood: You think it’s foolish that Senator Warren is trying to?

Bernie Sanders: I’m not saying it’s foolish. All that I’m saying is that we have laid out a variety of options that are progressive. We’ll have that debate. At the end of the day, we will pay for every nickel of Medicare-for-all, and it will save the overwhelming majority of the American people, who will no longer pay premiums.