I've really enjoyed the running debate between Austrian and MMT perspectives in this forum. But, I don't really think they are in that much disagreement, to be honest. At least, on a descriptive basis, I think they're pretty orthogonal. MMT describes one thing (fiat currency accounting on the macro scale), while Austrian economics comes in with the qualitative praxeology and marginal utility arguments.
I just think that some MMTers and some Austrians have taken their schools from the descriptive toward some dubious predictive/prescriptive conclusions.
Peter Schiff's hyperinflation thing is one thing, while MMT's got the job guarantee thing and the whole "we should have full employment or capital is being wasted" angle.
It seems like moda and stone are coming in with the second angle, where unemployment equates to wasted capital. Actually, I agree that unemployment may sometimes be a form of waste... on the other hand sometimes it might not be. I think it depends on the "reason" for the unemployment.
From Austrian economics, I've learned that the economy is much more complex than a factory churning out widgets. The factory always knows exactly what its goal is. It's only a matter of getting the raw materials and labor, and using them efficiently. In fact, the factory is single-minded and single-purpose to churn widgets out. If workers were sitting around inside the factory, or material was being wasted, then that's clearly a case of "rotting coconuts," (as long as there is demand for the widgets such that the factory is profitable in operation).
However, I think that the economy as a whole has a different goal: to provide as much as possible of what people demand, using as little labor and materials as possible. This goal is far more complex than churning widgets out. I think unemployment could be a reflection of uncertainty in terms of what direction the economy SHOULD be moving. It may take some time before the economy gains enough certainty to mop up the excess labor and materials.
In other words, I think it might actually be harmful to try to put those unemployed people to work in some cases. An analogy is Mises' example of construction workers building a house. Suddenly, they realize that they don't have enough bricks to finish construction by the original blueprints. The best course of action is to halt some construction activity until new plans are drawn up that incorporate the newly acquired knowledge. Trying to stimulate "full employment" would be the equivalent of telling everyone to continue building the house regardless of the brick shortage... until they build themselves into a corner. Then, they might need to go back and demolish some sections to rebuild them. This might result in more wasted labor and materials than if they had stopped while the new blueprints were drawn up.
In the real economy, this would manifest itself as malinvested resources... i.e. the people on the margin who are put back to work by the added printed "savings," MAY actually be doing work that has negative marginal utility for the economy as a whole. Otherwise, somebody would have hired them, and they wouldn't have been unemployed to begin with. The "invisible hand" could be trying to send a message through the tight job market. Perhaps there's something else the unemployed worker could be doing that would have more marginal utility than the specific job they are unsuccessfully seeking?
Another good Austrian analogy I like is one made by Robert Murphy (another guy who loves to talk about massive inflation). I think his Schiff-like inflation argument is flawed, but his Gnome Thought Experiment is great:
http://mises.org/daily/5626
"...imagine that one night, mischievous gnomes decided to rearrange all of the capital goods and skilled laborers in the country. The next morning, brain surgeons who were supposed to report to a hospital in Albuquerque would wake up in Miami. Factory owners in Trenton would open their doors and see that their assembly lines were gone, replaced by defecating cows. Farmers in Iowa, for their part, would be baffled to see drill presses and computer servers sitting in their empty fields."
I'm not denying that the MMT has the accounting correct when it comes to how fiat money flows between government and the private sector, but I don't agree that we can consistently reduce unemployment in a constructive way (defined as increased marginal utility) by manipulating the supply of the little pieces of paper we call "money."
Mind you, there are a lot of important qualifiers in that last sentence. So, even if unemployment numbers are empirically shown to decrease when you increase the private supply of money, that may not qualify as counter-evidence to the argument I'm trying to make here.