OK, lot of criticism about different premiers "slamming the borders" shut, but the brutal truth is there is a significant minority of the Australian population who just don't give a damn about the virus, or if they do, they don't give a damn about anyone else. Saturday, my first day of "freedom" in Australia since well early July when Victoria started going into lockdown #2 (I left MEL mid August to return to Singapore, coming back into quarantine in Sydney earlier this month).
1) Flying from Sydney to Melbourne on VA, Mask wearing compulsory. Person sitting one row ahead, but opposite was asked by FA if he had a mask, he said yes. FA, replied "Well put on then". A few minutes later overheard him talking to person sitting next to him ... even though from Sydney he just wrote on the permit form he was from "Green Zone" not the "Orange Zone", as he knew they wouldn't check. He was clearly from a demographic I understand figured heavily in Melbourne's second wave.
2) Mid evening caught up for a coffee. I've been programmed to check-in and check-out everywhere I go in SIngapore, restaurants, shops, shopping centres, even shops within shopping centres (a second layer of check-in), operating a national standard scheme for check-in/check-out using QR code, identity card or government provided fob (particularly useful for elderly). No one enforcing in Melbourne, and the QR code was so faded it was difficult to use, and no ability to check-out. Had to enter details, in Singapore when entering places, all driven by what is saved, and you don't even need to stop walking at most places, just scan the code and you are checked in. It is also built into the continually evolving "Trace Together" App (the basis of the COVID-SAFE app).
3) Later that evening, shopping in Highpoint. I did a count, only 1/3 people were actually wearing masks. Vast majority of non-compliers were also those in the demographic that I understand figured heavily in Melbourne's second wave. I will say, as Woolworths was closed had to go back next morning, and mask compliance in the centre was more like 80-85% in the morning.
IMHO think the border closures are a price we have to pay for not having some form of national track and trace, check-in type system + the absence of national identity system that could be linked to that. Ironically closures are a price of freedom.