"I don't see the fuss about the visa issues how many ozi pilots are working overseas"
Yes, majority I'd say are working for airlines hiring EXPATs or working for an airline in a country where they have a dual citizenship.
Recently spoke to former colleagues who worked up north and have said that the pilot I have mentioned WAS on a WHV with the same employer for more than 6 month because apparently if it's casual you can. Now, I'm not saying that's the law but it is what happened.
I agree with you Band a Lot that it is more expensive or an employer to sponsor an applicant because they need to pay them the same amount as an Australian, plus fees involved with the application. To be approved they need to show evidence that they are not enough Australians to fill the positions.