Currently, there seems to be no consensus on what a progressive candidate should stand for, particularly in terms of the economy. Reregulating the financial system, as important and difficult as it would be to achieve, will not by itself rebuild the middle class. Neither would Medicare for all, as critical as that would be, or ending our wars, or even forcing China to revalue its currency. The rot in the US economy is too great to be healed by simply stopping many of our destructive policies.
It seems to me that the centerpiece of a progressive economic agenda has to be about creating and maintaining jobs: permanent, high-skilled, good-paying jobs. And not just a million jobs here and there, but tens of millions of good jobs, to bring under- and unemployment down, lift the new (and old) poor out of poverty, and retain what remains of the American middle class.