Karl Marx's Communist Manifesto is the doctrine for those seeking a socialist dictatorship.
The United States and much of the rest of the world have a central bank. The the 5th plank of the Communist Manifesto actually calls for the establishment of a central bank.
When we have a central bank as advocated by the Communist Manifesto, how much of the banking system is actually dictated by free market conditions and how much of it is centrally controlled?
So why do socialist like central banks? It is about a control. A central bank controls the moneytary system. So as John Butler says in his article, "Marx and Lenin actually encouraged inflation as a means to confiscate wealth from the capitalists and concentrate it in a central bank owned and run by the state. The establishment of a central bank was plank 5 of Marx’s Communist Manifesto."