Laws requiring corporate charter also are a "condition of employment", what has that got to do with the price of tea in China?The union law is a condition of employment. That is the essential difference.
Americans are so enamored of equality that they would rather be equal in slavery than unequal in freedom.
Alexis de Tocqueville
The fact you cannot or will not address this makes it easy to see how you want to steer the conversation, and are failing to do so. Its not my argument, it is the facts and the context of "corporate legislative advantage" and how Unions use legislation to their advantage. You just dont want to see it.