This all (re)started because returned overseas travellers are infecting the general populace. Best to fly them into Commonwealth facilities like Woomera or Darwin, quarantine them, and then release back into general population. We will keep making this mistake, if we don't learn -vaccine or not. Listen to the experts.
Won't work as all it does is put a large group of people in close contact with each other and the virus will run rampant and it will be months before anyone is out. So basically the whole relocation program returning Ozzies comes to a standstill.
The problem is Australia and NZ are one of the few country's that don't require a PCR negative test prior to flying. Until this simple effective concept can be jammed through the thick sculls of those in power then the situation will not change.
Looking at the ABC website numbers, about 8000 people return to Australia each week and those entering the country with the bug can be as high as a few percent. Despite the fact te planes are mostly empty, you cannot fly 50-80 people for 12 - 16 h and expect the virus not to be transmitted, especially in BC and FC which is mostly full. At least the few bodies in EC is generally spread out, but they still use the same toilets.