EK would have to substantially increase their dollars though if you had to be based in Australia and pay Australian taxes.
Not compared to the total package of rent, school fees etc. paid in Dubai. If they opened a base, and that's a BIG if, they would pay as little as they thought they could get away with. I'd wager a weeks pay that a rate of about 180k for a Capt and about 100k F/O and they'd have 500+ apps inside of a week. Basically , I reckon they could pay significantly less than the 'going rate' and still be swamped with apps.