Singaporeairlines it sound's as if you have some sort of grudge against Australian/Indians?
I don't think any expat pilot feels they deserve a job or as you say should get red carpet treatment or maybe you have come across a few bad eggs i'd be interested to hear?
And on you're next point surely it's more a case of business/commercial sense. Airlines tend to recruit on a reactionary basis they get a sudden shortfall of pilots and hence need to get people online as quick as possible. I'm not sure on the stats on how many Singaporeans there are type rated but across the world the is a surplus to requirement so is why they are forced to look further afield.
I think things are looking up with the cadetships starting with schools recruiting for the likes of Jetstar and Tiger etc but again its a self sponsored route with all the risks.