> Employees are not prohibited from joining the union themselves, they are protected by law and Tesla can not stop them nor fire them for it.
Joining an union does not equate to having a CBA.
> From what I've read, the employees are quite happy as it is, and a collective agreement would actually make thing worse as it puts some restrictions on the relation between employer/employee.
What restrictions? Collective bargaining agreements set the minimum bar of the employment relationship, if Tesla already has better terms there's no reason to not sign one. They aren't forbidden to provide anything that is better than the agreement, they are only forbidden to go lower than the agreement.
Joining an union does not equate to having a CBA.
> From what I've read, the employees are quite happy as it is, and a collective agreement would actually make thing worse as it puts some restrictions on the relation between employer/employee.
What restrictions? Collective bargaining agreements set the minimum bar of the employment relationship, if Tesla already has better terms there's no reason to not sign one. They aren't forbidden to provide anything that is better than the agreement, they are only forbidden to go lower than the agreement.