The government, along with the media has basically scared Australians into submission that the very large majority of Australians believe the end of the world will come if the borders are open. And now, the PM has questioned the efficacy of vaccines, giving reluctant Aussies even more reason not to take a vaccine. Now, the Australian public wants borders closed and don't mind if it is many years.
The PM may have not explicitly said borders will be shut 'indefinitely' but that is what he means. The doctors/scientists control what goes on and elimination and 0-covid is the strategy. The borders will be shut indefinitely and unfortunately there is nothing we can do about it. I don't anything will change before 2025/26.
As for Qantas - I have to admit I'm surprised they don't see the writing on the wall, which is very clear - they won't be flying internationally for many years. The costs in keeping their international operations (aircraft (mainly A380s), international lounges, landing slots, licenses etc) is a killer. It is best they cut their losses now, sell off what they can and restructure to a fully domestic airline.