I am quite sure there will be plenty of job opportunities for holders of 457 visa's here. It's just a shame to see so many Australian job opportunities going to these people because companies do not want to invest in training/employment, and using the excuse that there is a lack of suitably qualified personnel.
It has been happening in Australia for a while now, even in QF through outsourcing.
Best of luck to the Emirates guys who are going through a pretty stressfull period.