Through much of human history, what you had was either a direct result of your labor or exploitation of the labor of others. As soon as industrial processes came into being, the usefulness of labor was greatly magnified, but the benefits fell mostly to the owners of the processes rather than the workers.
Now imagine a system where the workers or society owned the processes. What once took 50 workers a week could now be accomplished in a day. Thus their workload is greatly reduced. Now carry this to its logical endpoint.