Ask them what they do when they are on strike? Seems to me that solution should work here as well. They could engage in temporary work, for example. Eventually, they will get back pay unlike when they go on strike. Maybe the government should just make changes to union contracts that will encourage them to go on strike. Then, they won’t have any objections.
Yes. They are protesting because they are on a PAID vacation. How horrible for them having to stay at home and still get paid for it someday.
They're forbidden from striking. Remember the air traffic controllers and Reagan?