Byron White, National Labor Relations Board v…
“ Thus Congress recognized the validity of unions' concern about 'free riders,' i.e., employees who receive the benefits of union representation but are unwilling to contribute their fair share of financial support to such union, and gave unions the power to contract to meet that problem while withholding from unions the power to cause the discharge of employees for any other reason. * * *'We are therefore confident that the proposal made by the union here conditioned employment upon the practical equivalent of union 'membership,' as Congress used that term in the proviso to § 8 (a) (3) . ”
