> The obvious one that comes up in every discussion is thinking that unions will protect their jobs from being outsourced to other countries. People like to layer various more palatable explanations on top of this to make it sound better, but when you ask them if the employees who receive the outsourced jobs should get the same union protections you usually get their real motivation: They want to keep the jobs local to their own market and exclude foreign labor supply in order to improve demand for their services (and therefore their leverage, and therefore their own wages)

Bear in mind it's completely normalised for companies to charge higher prices in one market than another, and put barriers in place to make sure customers in the more expensive market can't just pay the lower price. So all the union is doing here is bringing it closer to a level playing field.