“State capitalism” is not capitalism, but capitalism crippled by statism (government controls).
The more statist an economy is, the less economically and culturally prosperous it is, and the more capitalist, that is freer the country is, the more economically and culturally prosperous it is.
Given the complete failure of socialism in practice, the reluctance of intellectuals to give up socialism in theory, and the refusal of socialist dictators to give up political power, a “compromise” was created. This compromise is a “mixed economy”: a mixture of freedom (free-markets) and slavery (state controls). In a “mixed economy,” a lifeline of freedom is provided to some areas of the economy to subsidize the failures of the state-controlled areas. One version of the mixed economy, popular with formerly socialist countries (hopefully) transitioning to freedom, is so-called “state capitalism”: where a number of enterprises are owned (and managed at some level) by the state. Where they are all owned by the state, this is not “state capitalism” but socialism.
No country today is purely capitalist — the United States of America is, in fact, a “mixed-economy,” i.e., a semi-free market — but range on a spectrum from totalitarian/statist to laissez-faire/capitalist. Modern examples of so-called “state-capitalism” are China and Russia, and to lesser extent countries like Singapore and Norway which are relatively freer. Elements of “state-capitalism,” that is statism are in all countries, i.e., the Norwegian government’s ownership of oil companies.
There is no such thing as “state capitalism” properly speaking; there is only capitalism (“laissez-faire capitalism”). All the hyphenated modifiers added to so-called “forms of capitalism” (“crony capitalism,” “late capitalism,” etc.) are simply descriptions of the different variants of anti-capitalist government interventions in a given capitalist society. Sadly when these interventions cause economic and social problems (which they always do) it is the pro-freedom, capitalist part (and not the hyphenated “statist” part) that gets the blame, i.e., “We tried capitalism and it didn’t work; we need more volumes of government regulation (statism) to solve the failures of capitalism created by those greedy capitalists.”
So when the enemies of capitalism blame the failure of the Union of Soviet Socialist Republics, Venezuela under Chavez, and Communist China under Mao on “state capitalism” what they are condemning is statism.
Capitalism is the social system based on individual rights. Capitalism has nothing to gain from the violation of individual rights, which is what all the “hyphenated” adjectives added on to capitalism refer to. A better description than “state capitalism” is crippled capitalism: a semi-capitalist system crippled by government regulation and controls.