It's all in this article:AdamA wrote: At the risk of derailing your discussion, would one of you guys mind explaining (to a guy with a limited understanding of economics) what the difference between MMT and Keynesianism is?
http://www.economist.com/node/21542174
...But the big difference (unless I'm forgetting something) is that Keynesianism believes that a government must save and store up a surplus during good times so that it can spend that surplus during bad times.
MMT just explains that concept is nonsensical in a fiat monetary system. When the government is just creating money and bonds with keystrokes (like a scorekeeper controlling a scoreboard) there is no way that a government can meaningfully save its own money. When you pay your taxes, all that happens is that the IRS is deleting that money from your bank account. The US Treasury doesn't have a bank account where your tax payments go. When the Treasury spends money into existence, it just credits bank accounts with its keystrokes.
When we were on a gold standard — with convertibility to gold — Keynesianism's prescriptions of saving during good times to spend during bad times may have been more applicable. Now those prescriptions are obsolete. For a Keynesian economist to admit that now would require them to pretty much nullify everything they've ever worked on since 1971.
Since our base money supply comes from government spending, MMT also shows us how a government surplus actually drains money from the private sector (when the government taxes more than it spends) — which explains why depressions almost always follow government surpluses. Instead of the continuous surplus/deficit driven boom/bust cycles in the private sector, MMT attempts to optimize the fiat money creation/destruction process in a way that maximizes output and productivity in the private sector.
As I was saying in my earlier posts, MMT's theoretical prescriptions (job guarantees, sales taxes, or asset taxes, etc) are unproven and debatable. But, the descriptive fundamentals of MMT (Treasury bond issuance, base money supply, taxation, etc) are an accurate description of our fiat monetary system. You don't have to believe in the theoretical prescriptions to understand the fundamental truths of MMT.
Cullen Roche's articles on Pragcap.com is a good place to start learning about the fundamentals of MMT. But, it requires patience and setting aside the gold-standard era thinking that we all learned in our textbooks.

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