Even a die-hard Keynesian would agree that while the monetary supply is not fixed, the amount of productivity in our economy is at any given moment. And when w

Even a die-hard Keynesian would agree that while the monetary supply is not fixed, the amount of productivity in our economy is at any given moment. And when we decide to spend $5T of printed money on something boneheadedly stupid, while those dollars are not technically lost, we did lose our capacity to spend two decades, $5T worth of labor and supplies on something else -- something that would have made us all richer people today. And as any economist will tell you -- you can print money right up until you can't. And when you realize you can't print anymore money -- it's already too late to course correct without inflicting tremendous misery on real people.