Single company unions are very interesting. There’s often very little reason not to join a single company union. Not joining means your coworkers will already

Single company unions are very interesting. There’s often very little reason not to join a single company union. Not joining means your coworkers will already dislike you, and typically your pay will be higher anyway. This makes single company unions incredibly easy to form strong monopolies on their employers labor supply. Contrast this to monopolies in the greater market, a company typically needs to dominate the entire industry to form an effective monopoly. Effectively unions limit a company’s labor supply to a single supplier - the union - despite there often being hundreds of other near identical suppliers/unions in the greater marketplace. Imagine if you could only buy smartphones from Apple, and other people could only buy smartphones from samsung. That’s effectly what single company unions accomplish. Quite miraculous.