Do you mean this stolen one?
Keynesians will never admit they’re wrong. Deficit spending is only around 10% of GDP. No matter how much deficit spending, Keynesians will always claim the deficit has to be by a higher percentage to work.
It has ?
...Gee from my perspective...it's still the leading economic theory in Washington, Wall Street, every major paper of record, all the major academia institutions, liberal think tanks...etc...
Keynesian economic theory is far from discredited...it should be treated like the red haired step child...
Keynes said that to reverse a recession the government should stimulate private sector investment with deficit spending by borrowing money (for example, that is not what President Obama has done - almost all of his stimulus money went to government programs and workers - federal money bailed out state programs, and unions more specifically). Keynes favored surplus spending during economic expansion to pay for additional spending during downturns. If deficits became necessary Keynes also directed that a parallel plan be devised at the same time to immediately reduce the deficit into a surplus to rebalance the books once the recession was over (don't hold your breath waiting for Obama's surplus plan). Keynes opposed structural deficits like America has had for decades. He advocated only temporary deficits and debt, with surpluses as a norm. That has never happened. Keynesian deficit/surplus economics has NEVER been utilized by an American government since Keynes put out his theory. And Keynes did not advocate that government should or even could stimulate consumer demand (as liberals constantly claim), only that it could help sustain private investment, which also rules out tax increases during downturns.
Since Herbert Hoover America has been economically managed using a model more accurately labeled progressive-fascism.