While this arguably might be true of some sectors (like the auto industry), the same cannot be said for unions like those of service workers, teachers, and those organized by the IWW.
And this narrative of course absolves business interests of things like how they used the red scare to attack union leadership, buying themselves judicial and favorable NLRB rulings, not to mention how curbed they are in their power relative to unions in Europe by the Taft-Hartley act:
TEACHERS? Teacher's Unions (as well as various other service workers...like the Department of Water and Power) are notorious. Their authoritarian and misappropriation has been the top story in California off-and-on for decades. This isn't to say that unions are a bad idea, but there's a direct correlation between union leadership corruption and 10th percentile income bases those unions derive from. They fail uniformly (over a long enough period of time) to prevent bad actors from subverting their purpose.
And this narrative of course absolves business interests of things like how they used the red scare to attack union leadership, buying themselves judicial and favorable NLRB rulings, not to mention how curbed they are in their power relative to unions in Europe by the Taft-Hartley act:
https://jacobinmag.com/2017/12/taft-hartley-unions-right-to-...