If people wish to join a union, the shriners, a local charity, a church and support it with their time, effort and money, that should be their right. If a person chooses not to join any of these organizations, no-one should be able to compel them to do so, and no-one nor any organization should be able to claim a right to their time, person or property.

Doctors do not have to join the AMA in order to practice medicine; lawyers do not have to join the ABA in order to practice law - then why should a teacher be required to pay dues to a union in order to teach?