Because there was a state, there remained a class system, and money was still in use. The three main things communism aims to do: stateless, classless, moneyless. The USSR was a socialist state, with an aim toward communism, which are the tenets of Marxism-Leninism (my emphasis), a form of socialism. Communism is a different form of socialism.
Because there was a state, there remained a class system, and money was still in use. The three main things communism aims to do: stateless, classless, moneyless. The USSR was a socialist state, with an aim toward communism, which are the tenets of Marxism-Leninism (my emphasis), a form of socialism. Communism is a different form of socialism.
Lenin himself made this distinction.