I worked at a paper mill for 3.5 years. This mentality is typical - as if the employees can make their own rules and come and go as they please and the evil management just didn't understand their cause.
This day without immigrants is just one of the many agit-prop Alinsky tactics that the left uses, hiding their real agenda under the guise of lawful immigration.
The attitude is: “I do all the work and the boss makes all the money.”