https://en.wikipedia.org/wiki/Cornelius_CastoriadisIn his 1949 essay "The Relations of Production in Russia", Castoriadis developed a critique of the supposed socialist character of the government of the Soviet Union. According to Castoriadis, the central claim of the Stalinist regime at the time was that the mode of production in Russia was socialist, but the mode of distribution was not yet a socialist one since the socialist edification in the country had not yet been completed. However, according to Castoriadis' analysis, since the mode of distribution of the social product is inseparable from the mode of production, the claim that one can have control over distribution while not having control over production is meaningless.
Castoriadis was particularly influential in the turn of the intellectual left during the 1950s against the Soviet Union, because he argued that the Soviet Union was not a communist but rather a bureaucratic capitalist state, which contrasted with Western powers mostly by virtue of its centralized power apparatus.