The natural function of a trade union and the one for which it was historically conceived is to represent those employees who want collective representation in bargaining with their employers over terms of employment. But note that this function is perverted the moment a union claims to represent employees who do not want representation, or conducts activities that have nothing to do with terms of employment (e.g. political activities), or tries to deal with an industry as a whole instead of with individual employers.—Barry Goldwater, The Conscience of a Conservative
