The return to some sort of normal spending will be swift, just not so for a minority of industries (international travel and tourism).
A great deal many Australians are still working full time, some of them under different conditions, some of them under normal conditions. There are many people who will be chomping at the bit to travel domestically (driving or flying) or taking a holiday. As soon as restrictions begin to ease there will be increased optimism, increased movement and increased expenditure.
Australia as a whole is doing very well regarding suppressing the numbers of infected cases. We are fortunate to be an island nation having full control of its borders.
People (yes, myself included) have short memories - life will one day return to normal and we will look back and wonder what the fuss was all about. I will probably just remember it as the time I watched Tiger King on netflix. Oh, and the time I didn't do as much flying as I would have liked. Take care people.