The virtues of expansionary monetary policy

Professor Krugman, at his NYT blog:

These past few years have been lean times in many respects — but they’ve been boom years for agonizingly dumb, pound-your-head-on-the-table economic fallacies. The latest fad — illustrated by this piece in today’s WSJ — is that expansionary monetary policy is a giveaway to banks and plutocrats generally. Indeed, that WSJ screed actually claims that the whole 1 versus 99 thing should really be about reining in or maybe abolishing the Fed. And unfortunately, some good people... have bought into at least some version of this story.

What’s wrong with the idea that running the printing presses is a giveaway to plutocrats? Let me count the ways.