It is, indeed, fascinating how little respect workers have for each other. Any little concession they can offer an employer to screw over the guy beside them, they will take it.

Unionization helps develop somewhat of a brotherhood to keep the nastiness at bay, but even then the members generally want to keep it an exclusive club, not something for all workers to join. As a result even union members still see external pressure from the workers outside of the union still trying to them screw over.