Yes. I think people should grasp that more clearly than they do.
It’s always a market economy of Supply and Demand. Even in a “perfect” communist state, they will produce only X amount of bread and have to distribute it to Y number of people. That’s a Supply and Demand equation right there.
“Capitalism” in one form or another is everywhere. If a railroad needs to be built, or a steel factory built, then capital resources need to be applied to that problem. China, Russia, USA — it’s true everywhere.
As you point out, the really key issue can be simply summed up: “Who controls your capital?” Is it the Individual? Or the Collective?
And we know by know that Individuals will work hard if they are really earning capital. But the Collective? No one works very hard in a Collective — they figure other people are probably working hard ... so they don’t need to bother.
You get shortages whenever the Collective is in control.