Read and reread the excerpt from We Shall Not Be Moved.The officers of Local 25 sent them on to the owners — along with one more demand, recognition of the union. This came to mean the "closed shop." Only union members can work in a closed shop, since the only way to set uniform wages and standards is to have the union do it; otherwise employers would always try to undercut one another. And the union can standardize the industry only when it controls the supply of labor through the union shop.