I really don't think "deficit spending was the answer to virtually all economic woes" is a remotely correct characterization of Keynes' theories or contributions. Frankly that's just a libertarian strawman, and deploying it in a thread notionally about rational discourse seems sort of unserious.
Forgive me for not writing a full dissertation dissecting all the terrible ideas that Keynes had. I think my characterization is a pretty accurate shorthand to summarize his primary contribution to economic theory, and the theory that he is best known for championing (in America at least).
Either way, it's irrelevant what Keynes actual theory was; the point of my argument is that he continued to offer proposal after proposal and excuse after excuse for why his theory didn't actually work in practice (to end the Great Depression) instead of changing his mind and accepting that he was just wrong.
