[bjourne]

> Honest answer: because in many states, the law is that a certain vote can force that contract into place, not merely deprivation of labor by the pro-union segment.

Now you're cherry-picking. There are several other laws that regulates what employees and unions can do, what they can demand and how etc. For example, the union must be open to everyone so the agreement can't be used to give preferential treatment to someone.