It's been pointed out time and time again, even on PPRuNe, that the main perceived threat in mind with regard to aircrew is the "innocent" crew-member who is coerced into carrying an item into the sterile area for use by a culprit in his illegal activities.
If this is the case then why are they not worrying about "innocent" Australian air-side workers who could be "coerced"? Workers such as engineers, caterers, baggage handlers. None of them, not ONE of them, gets screened in Australia as they go air-side! We all know it, no one is doing anything about it.
Heck, they don't even have to be "innocent" or be "coerced". They can take contraband through on their own volition for their own devious reasons. And they're not going to blow up with the plane if they toss something explosive into the bulk hold, or the like....
Everyone in the industry knows this. It's no secret. The pilot charade is all for show. Trouble is, no one with any real power to fix it is listening.