The phrase is ambiguous. Are you another brick in the wall? There is a difference between free will and driven "free" will. Are we truly free, successful, rich? Or there is always an impenetrable "glass ceiling"? We could be ignorant slaves fooled by little chunks of glass we see as gems. When we enter the office, the tube, the post, when we buy the daily newspaper, our canned food, the latest, expensive fashion item, when we rent an apartment/house/whatever identical to the next-door one, when we watch the same TV show as lots of others (god, you didn't make it, I didn't make it, someone else made the show and approved it to be seen by us), when we work and try and sweat and fight and compete and bleed for that position, and we relise the position is controlled by other major or minor, inside or (even more) outside variables, think again; think clear! Are you really you? Are you really free?.
"All in all you are just another brick in the wall."