Dogtower, Keynes was the accepted economic theory in almost every University from after the war to recent times. Eeven the G8 conference accepted the need for spending in some areas. See the New York Times.
Universities are run by Leftists who agree with Keynes, citing such a biased source is meaningless.
Scale down the Keynesian economic theory to the individual level and no rational individual would ever pursue such a course of action: "I just lost my job, I need to go run up a bunch of debt on all my credit cards so that I can become gainfully employed as quickly as possible." Such a theory is totally irrational.
A system that fails on the individual level will not work on any level, not with 10 people, not with 1000 people, not with an entire nation of people. It is only because of government's ability to spend (steal) tax dollars that don't yet exist (debt), from generations not yet born, on current existing generations that you can be convinced that such an economic theory has merit.
Going back to the example I gave... Let's say Visa came out with an inter-generational credit card that allowed you to rack up $1,000,000 of debt over the course of your lifetime and you were only required to make payments on the interest you had already accumulated. For the sake of argument, let's say it has a 5% interest rate. You could rack up $1,000,000 in debt over the course of your life and use $50,000 of that debt to cover the interest, leaving you with $950k to spend. Your child then gets handed the card and racks up another $1,000,000 in debt and only has to use $100,000 of that new debt to cover the interest. Your grandchild is then given the card, he racks up another $1 million and uses $200k of the new debt to cover the interest.
For several generations, this will seem like a great system but the conclusion is obvious and inevitable; eventually the amount of money needed to service the debt will exceed the credit limit. The generation that gets handed that ticking time bomb will be decimated by the greed of all the generations that came before it, generations who cared only about themselves and not about the misery they would be leaving to future generations.