I never said it was an ethical system, but it has helped industrialize larger empires, whether or not it exploited other people.
And China did not "abandon" the system of state-owned economy. Their economy is still state-owned, but with some capitalist modifications. It is still hardly a "free market" in the Western sense, as the state maintains ownership of most industries. As far as in Civ terms, although maybe not in the Marxist sense, China's economy would definitely still be considered "State Property."
Yes, the Soviet Union industrialized off the exploitation of its people (not just non-Russians, but Russians as well). But that's no case for nerfing State Property in the game. Did the U.S. and all of Western Europe not industrialize off the exploitation of slaves and colonialism? There would be no industrial revolution without forced labor producing an abundance of raw materials. So why not make the case to nerf "free market" or "mercantalism" because those economies also required the exploitation of forced labor?
And did I ever claim it was "simple?" No, I said it was NOT simple in response to an earlier post who claimed that state property was simply not an efficient economy in any sense. I replied that no, it is that not simple, as there have been cases of state property economies industrializing at alarming rates, whether or not off the exploitation of labor, which has historically been required for any industrialization.
I never said "all socialist economies have been an unquestionable success," so I feel no need to even address your point referring to Cuba and North Korea. If anything, in Civ terms, your examples of Cuba and North Korea again reinforces the point that state property is only useful if you have a large empire. But there are also a thousand cases of devastated free market economies, so I am not sure what you are trying to prove anyway.
Forget the ideology and talk about historical facts, I don't know much about the USSR, in China the reality is the Great Leap Movement almost destroyed their economy. Millions of people practically starved to death. In early 80's the majority of people were near the poverty line. There was a famous popular saying in China back then: "Work, get $36; don't work, get $36", which means those employees in those state-owned companies would receive only $36 RMB per month regardless of whether they are lazy or hardworking. State-owned economy has been shown to be highly inefficient, or else please explain why China gets rich so fast when Deng XiaoPeng abandoned the system for "revised socialism" (= capitalistic economy).
For USSR, there are also a lot of exploitation of the non-Russian people involved.
And where is the industrial powerhouse in Cuba and N. Korea?
The so-called industrial powerhouse phenomenon is indeed not as "simple" as you claimed. In game's terms, the communism option in Civ 3 (or 2?) is actually more realistic. The enhancement in hammers is largely derived from diminished commerce, cheap labor and subsequent reduction of happiness.