Do y'all know the difference between "right to work" laws and "at will employment" laws?
Right to work laws ONLY mean that you can't be forced to join a union or pay dues to a union as a condition of employment, they DO NOT mean you can't unionize
Workers without a contract are considered “employees at will.” That means they can be fired at any time and without reason, the only EXCEPTIONS are termination for discrimination, whistle-blowing or union organizing.
Unless workers have a union contract, they are at the mercy of company policies. This is where collective bargaining comes in to the picture.