William O. Douglas,
Local 357, International Brotherhood of Teamsters…
“ An employer, of course, need not hire an incompetent man and is free to discharge an employee who lacks skill or ability. But if the right to join or not to join a labor organization is to have any real meaning for an employee, the employer ought not to be free to discharge an employee merely because he joins an organization or to refuse to hire him merely because of his membership in an organization. Nor should an employer be free to pay a man a higher or lower wage solely because of his membership or nonmembership in a labor organization. ”
