This is in contrast to a capitalist system, under which ownership and control belongs to individuals or private businesses. The most insidious aspect of a socialist system is that by definition, the state must be totalitarian. This is an emotional argument that does nothing to address the actual issue - that socialism must be totalitarian to function. The only way for a government to redistribute a person's wealth is to take it away by force and then make the decision about who is to receive it. It must regulate how much a shopkeeper can charge for his goods.
All economic freedom is lost, and with it, the freedom of individual autonomy is lost as well.
Socialists like to argue that under socialism, everything is fair and wonderful, and everyone is free and happy, because everyone is taken care of. The problem here is that simply cannot be true. Society is made up of individual people. If you take away the individual freedoms of each person in a society, you have effectivly reduced the freedom of the society as a whole. This is the exact opposite of what socialists claim.