Labor rights or workers' rights are a group of legal rights and claimed human rights having to do with labor relations between workers and their employers, usually obtained under labor and employment law. In the United States, critics objected to unions establishing closed shops, situations where employers could only hire union members. The Taft-Hartley Act banned the closed shop but allowed the less restrictive union shop. Taft-Hartley also allowed states to pass right-to-work laws, which require an open shop where a worker's employment is not affected by his union membership. Proponents of "right to work" legislation claim that workers have the right to work whether or not they join a union. Labor counters that the open shop leads to a free rider problem.