I outsource my comments to Scott Sumner.

So let’s start over. The Fed is unwilling to provide enough monetary stimulus. OK, now what is the point of this paper? Is this to train our future econ PhD students? Are we trying to teach them the optimal policy regime? Obviously not. The optimal regime relies on monetary policy to steer the nominal economy, and fiscal policy to fix other problems. So we are going to defend the model how? A blueprint for failed states? For banana republics? Fair enough, but ask yourself the following question: In a failed state, which is more incompetent branch of government; the central bank or the legislature?

Read the whole thing. I would be shocked if the Brookings panel produced comments that are as provocative or well-written as Scott’s.