First let me tell you that a Wobbly is a member of the Industrial Workers of the World. The IWW is a labor union, but much more. I shall assume my reader has a rather negative picture of labor unions. What separates the IWW from other labor unions is that it is completely grassroots-controlled. To the IWW, the term 'union boss' is an oxymoron.
Any boss is the enemy, a member of the opposite class.
The IWW is controlled by its workers from the ground up, via grassroots democracy. There are no mafiosa or skates in the IWW, because there is no niche for them to fill. The Secretary-General runs the office and fulfills the decisions of the membership, which are made by wholly democratic referendum. The IWW, because it is completely responsible to the working class people who form and control it, is feared and hated by the Bosses and by the Government, who have sought to destroy it, including by violent means. Bosses have, in the past, begged AFL-CIO unions to come in to compete with the IWW to represent angry workers because those 'unions' are controlled by skate bureaucracies, not by the workers, and are responsible to the Boss instead of to the working class.