One viewpoint amongst the Tax Agents [Leaked from the ATO] is that following the demise of Ansett.....a stack of guys [girls as well I suspect]..started working in Asia, and giving the ATO the impression that they were based there as well, where in fact they were still living in OZ.
Their "false" Asian addresses were discovered....and the ATO put plans in place to stop the activity.
Pity about the long standing Rotorheads/Engineers who spend more time away than in Oz getting snared due to the selfish attitude of some recent newcomers.