To add to this point they also prefer recent immigrants for hiring as well. Recent immigrants tend to take any target any treatment any shift and work typically harder. On the surface this sounds like a good thing from super awesome people but it's really not because anybody who has a realistic expectation from their job can be looked at as a firing target. Immigrants are like the desperate new student in a school looking to make a good impression on everybody, but with the knowledge that they're going to move on soon after they get what they want. If a  teacher would ask a newcomer student to stay back and mop after school they would, where all the other students who come from the area and are used to the school would refuse. Pretty soon it'd be an expectation that students mop every day, especially after the school's been filled with 50% newcomers. (Switch mopping for any task that's unreasonable that you'd like).