The Keynesian is ever mistaking economic activity for economic growth, credit expansion for wealth creation, profligacy for progress. Growth, wealth, progress. He uses his own definitions of each to reinforce his definitions of the others. And they are all fallacious.
When the Austrian tells the Keynesian that the printing and spending of mere pieces of paper cannot lead to more wealth in society, the Keynesian retorts that it is undeniable that credit expansion and stimulus lead to more economic activity. In this he is technically correct. Printing more dollars and handing them out to those who would consume and invest them, does indeed lead to “activity,” even more perhaps than there otherwise would have been.
But our Keynesian assumes, or assumes that his audience will assume, that mere economic activity is growth, is wealth, is progress. Presumably this includes even that activity which our Austrian rightly considers overinvestment (more properly, malinvestment), overconsumption, and/or the proverbial breaking of windows, each of these a common side-effect of the Keynesian witchdoctor’s remedies (often intended to cure ailments caused by earlier interventions, some Keynesian, some not).
If the Keynesian’s definition of economic activity doesn’t (oh, but it does!) include these things then the burden of proof is on him to show that his prescriptions lead to more real growth than would their absence on an unhampered market. And that his incantations lead, on the whole, to economic health rather than disease. A free market is largely unencumbered by the ailments mentioned above so in order to do this it would need to be shown that the sicknesses that do affect it are somehow worse than those caused by intervention.
And to be sure, pure economic freedom isn’t perfect. It has its own share of maladies. But these are all coughs and sneezes by comparison. Cures, if they are needed at all, come from the market itself. The economic meddlers and potion peddlers only serve to make things worse.
We must admit that not even on the most unfettered of markets does all economic activity lead to growth. For human actors err, and the market punishes their errors. How much more is all this the case under a centrally-planned expansionary-monetary/stimulatory-fiscal regime? And how much more severe will be the punishment?