As I've said before, "wage slavery" and "blacklisting" which are products of unhindered capitalism, do not exactly provide any freedom to the individual. Hence a degree of regulation of the market is a necessity for protecting individual liberty (and safety I might add). So appropriately used socialism also aims to protect individual freedom and liberty or however you want to spin it.
Capitalism and Socialism are economic philosophies that approach protecting individual liberty from different directions, but both have their conception of how individuals can be economically free. Capitalism does so by asserting property and Socialism does so by asserting possession.