Great post, JK. Come to think of it, even the monetary keynesianism hasn't gone so well ... in the same way that fiscal keynesianism lost its symmetry, so had monetary policy under the Greenspan Fed. The tightening was weak while the easing was strong. That's why the Fed ultimately found itself bumping up against the zero bound; rates kept coming down more than they went up.

Unfortunately, at this point we're fast running out of kinds of keynesianism to try...