I think that you are referring to laws involving strikes and collective bargaining. Many states have outlawed strikes by public employees although those bans are not enforced much. Some states do not allow collective bargaining. I support laws against strikes and collective bargaining for public employees because the taxpayer is at a huge disadvantage in these situations.
If a company wants to bargain collectively, the company should not be forbidden to bargain unless the bargaining creates a monopolistic situation in the industry. I am confident that few companies would engage in collective bargaining if laws did not compel them to bargain. Unions are monopolies that are created and maintained by legislation.