Being a relatively junior line holder I have wondered this myself. In part I think this helps others at the company in ORD better than it does myself. However, I can't think of any reason this is a negative for me. For new hires it might be the difference between starting off in LGA vs ORD. Since the huge influx of applicants and full new hire classes I can't see anyone staying there longer than a month or two. In the old days we had vacancy bids pretty much ever month and I hope to see that happen again shortly.

Good luck with the interview. Find the gouge. Dry clean your clothes. Polish your shoes. Be prepared.