> Capitalism demanded The nature of supply and demand means that adding people to the workforce lowers the bargaining power of individual workers, regardless of their sex, which lowers wages. Once a certain amount of women started to work without their spouses stopping to work, most women and men had to work to support the family.

Socialist countries like the USSR are no different, but due to another tradeoff. By ignoring the nature of supply and demand in favor of a command economy, they had massive losses in efficiency in a way that forces everyone to have to work, and even then only producing mediocre results.