Let me give you an example.
The United States passed special legislation to manage labour relations between employees and railway companies. It has a very elaborate mediation and conciliation regime that needs to be used prior to the strike phase. This device makes it possible to exhaust all recourse, by bringing competent people to the discussion table to determine whether the requests of both parties are reasonable or not, so as to influence the outcome.
As you just said, it would also be possible within the current framework to broaden the definition of what constitutes an essential service in order to be able to cover certain circumstances, such as a strike in the rail sector or in the supply chain. There are a series of choices.