I don't think we have a long term plan on arrivals just yet. Just (as previously mentioned) talking with NZ about the bubble.
We can't stay like this forever, but as we produce the vast majority of what we need we have more time than many other countries.
I don't think we are more caring or less dumb (we have a couple of covid deniers). I think Australians tend towards 'big picture utilitarianism', so while we can see, acknowledge and dislike the immediate damage to the economy it doesn't take a whole lot of thinking to wonder whether it would be worse for the economy to have a lot of people sick and dying at the same time.
There is a middle path between the US where it is just burning and China where people were welded into their homes.
Having so much more space, a (generally) comfortable population and food security helps a lot as well.
Fingers crossed we get away with this. I feel like we have used the time we bought well in getting the tracing down, giving the hospitals time to prepare and giving the scientists time to work on a treatment (and longer term a vaccine).
Personally, I think the biggest difference is the space and the heat and I am worried about winter. A nice warm wet winter would be great all round.