Yes, but people lose sight of this. I suppose in the context of this thread, we can look at the productivity of a system that includes money or does not. A sm

Yes, but people lose sight of this. I suppose in the context of this thread, we can look at the productivity of a system that includes money or does not. A small system, like a tire production line, can measure its productivity in terms of money, which is outside the system. But a large system, like society, includes money, and cannot measure its own productivity using internal things.