this manifests itself in the job market as well, as people from the same culture/background "help" each other get positions/contracts. then again, isn't this what humans have always done, tend to their own? I mean, if you identify with a group, you naturally show some loyalty to that group.

Because I've lived in several countries and somewhat assimilated different cultures as my own, I personally don't identify with any one group enough to do this. So among cross-cultural people I can say they/we tend to the opposite. Just from personal experience that is...