These workers are highly experienced professionals in critical industries and have been chronically underpaid for over a decade(s). Many have risked their lives and health and that of their families during the pandemic. Bringing in agency staff will not solve the labour issue in these areas but make it much worse. Already we have lost so many dedicated professionals in these areas the services are on their knees. As a society we need these services to keep us healthy, safe and educate our next generation. As one of the richest countries in the world we can afford it if we want to and we will be much poorer in all ways if we don’t.

Ok I'm in favor of unions but how is this the case? Businesses can hire whoever they want.

But the unions, which represent around three million workers, argued that the government had breached their rights by failing to consult them on the changes.

Is that it?

My understanding is the way they introduced the law was illegal, i.e. doing so without proper consultation, and therefore it's invalid. But I thought the court didn't rule on whether the law itself breached the right to strike.