1. Lucas' criticism of Keynes approach having no microfoundations has been proven wrong by Wu (2017). One can criticize Keynes' lack of technical skills but never his insight, which was misunderstood and ignored for 80 years.
2.Because Keynes's principle is proven correct in math then the bottom-up emphasis incorporating microfoundation by New Keynesian models is just unnecessary complications vs income growth theory. In fact, neither neo classical nor new keynesian economics can provide a scientific consumption theory.
