I Will give you a quick example;
2 years ago QR did not accept CRJ pilots, they did the interview a looong time ago and were not accepted,then they were called 6 or 8 months ago aprox. so in those 2 years a good amount of F/Os have shown very good skills, know the routes, company procedures,etc.. what for?? So they can become babysitters of todays DECs. When I am deadheading i feel safe depending on who is the F/O, many good guys I've flown with and will make excellent captains.