Also, section 8 of the International Covenant on Economic, Social and Cultural Rights, which the US signed in 1977.
This article shall not prevent the imposition of lawful restrictions on the exercise of these rights by members of the armed forces or of the police or of the administration of the State.
If collective bargaining for the purpose of wage were protected, I'm certain Federal Employees wouldn't be restricted from them. If collective bargaining in general were a right, employment contracts that provide even breathing the word 'union' as grounds for termination would be illegal.
Moreover, the United Nation's Human Rights Council includes China, Cuba, Saudi Arabia, and included, until just recently, Libya. Not exactly the best line-up considering what they're tackling.
It is supposed to be legally binding, but even if it wasn't, rights are not supposed to be subordinate to congressional law. The ninth amendment places our rights above congressional whim, and the right to peacably organize goes hand in hand with the first and second amendments in terms of importance.
Okay, if it is binding and these rights are respected, I submit:
(1) Everyone has the right to freedom of peaceful assembly and association.
(2) No one may be compelled to belong to an association.
Closed shops and mandatory memberships are also rights violations.