" A successful union reduces the number of jobs available of the kind it controls. As a result, some people who would like to get such jobs at the union wage cannot do so. They are forced to look elsewhere. A greater supply of workers for other jobs drives down the wages paid for those jobs. Universal unionization would not alter the situation. It could mean higher wages for the persons who get jobs, along with more unemployment for others. More likely, it would mean strong unions and weak unions, with members of the strong unions getting higher wages, as they do now, at the expense of members of weak unions. "

― Milton Friedman , Free to Choose: A Personal Statement