And what makes you think Jetstar wouldn't have a tough application process with an estimated 20,000 potential applicants?
Does anyone seriously expect there will be 20,000 applicants? When QF advertised for their fully funded cadetships leading into a depression in the late 80s they only had about 6,000 actual applicants each year. Sure, J* may get 20,000 hits on their website or perhaps even 20,000 downloads of the application forms but 20,000 actual applicants is hyperbole.