No, they should be fired and replaced. The government has no authority to force someone to work, and the employee has no right to keep their job if they go out on strike or choose not to work for any other reason. I understand that the government does not want certain services to stop (the mail, trains etc.) but I don't think this justifies force. A possibility might be that a bond would be issued when the employee is hired which allows for the government to be compensated for the loss of the employee when they go rogue, this money can then be used to train a replacement. Or that the employees pension is only theirs on the condition that they do not strike or refuse to work for any reason. I think this would be better than allowing the government to use force, they already use to much of it in every other spheres of action, lets not give them any more excuses.