While your critique of De Long in this case is accurate it still misses the mark regarding how we end DSGE/Neo-classical economics and replace it with something truly paradigm changing. That something is discovering and applying the new monetary paradigm because money is an integral and essential element throughout the entire economic process.

The subject of money is cluttered with crackpots, long term invalid orthodoxies and like every historical paradigm change runs up against the two biggest obstacles to change which are cynicism/mentally stopping change before it even can begin and the unwillngness/inability to embrace ambiguity due to the fact that all new paradigm concepts have always been in direct conceptual opposition to the current anomalous paradigm…and hence one has to make a leap of faith over the seeming illogicality of the new concept.

The present monetary paradigm for the creation and distribution of all new money is Debt ONLY as in the burden to repay, and so to follow the historical trend of complete conceptual opposition the new paradigm is Strategically Implemented Monetary Gifting. https://www.amazon.com/Wisdomics-Gracenomics-New-Monetary-Paradigm-Policies-ebook/dp/B0C49B9PX7/ref=tmm_kin_swatch_0?_encoding=UTF8&qid=1552358772&sr=1-1-catcorr