Workers have the right not to work. They have the right not to show up to their jobs. If an employer doesn't like it, the workers should be fired.
Well, yes, they have the right to strike in the sense that police can't force them at gunpoint to go to work. But pursuant to the Taylor Law, and as stated by Bloomberg, they will be fined two days pay for every day they strike, and their union is being fined $1 million per day. Some 'right'!