Gary Galles writes in today’s Mises Daily:
As Walter Block put it in “Labor Relations, Unions, and Collective Bargaining: A Political Economic Analysis,” “unionism … admits of a voluntary and a coercive aspect. The philosophy of free enterprise is fully consistent with voluntary unionism, but is diametrically opposed to coercive unionism.” Voluntary unions are consistent with liberty because “if it is proper for one worker to quit his job, then all workers, together, have every right to do so, en masse.” And in his “The Yellow Dog Contract: Bring It Back!” he addressed this issue directly:
Are unions per se illegitimate? No. If all they do is threaten mass quits unless their demands are met, they should not be banned by law. But as a matter of fact, not a one of them limits itself in this manner. Instead, in addition, they threaten the person and property not only of the owner, but also of any workers who attempt to take up the wages and working conditions spurned by the union. They also favor labor legislation that compels the owner to deal with the union, when he wishes to ignore these workers and hire the “scabs” instead.