Seriously
From where I come from, unions are mainly a way for lazy employees to get immunity while doing nothing all day long.
I would still maintain that if you live in a country where it's legal to be called at any time, any day, then you have a third world class labor law - go downvote US :>
If other things are considered more valuable than proper labor law (like, say, building a wall), then I guess voters get what they deserved.