I don’t know why they employees are so gung-ho with their union. My oldest boy worked there when he was in college. He was very conscious, never called in sick, always worked the schedule he was given. Then he asked in advance if he could have his birthday off - which he was entitled to according to the union agreement. He his boss told him no, he could not have that day off. So he tried to contact the union. Never heard back from them.
He found a better job somewhere else very soon after that incident.
Interesting story. Good for your son! :-)