I agree with everything you said. Have you considered that the Keynesian model might be a failure since it does not account for human nature? I don't believe

I agree with everything you said. Have you considered that the Keynesian model might be a failure since it does not account for human nature? I don't believe a government will ever reliably cut spending in good times and spend more in bad times. I am starting to sound like socialists saying "it's never been properly implemented!" Well, maybe the core idea works on paper but ignores human nature, maybe it simply can't be implemented properly.