If this goes on for many months, then NZers living there without Aus residency/citizenship could find themselves to be in very deep trouble with no access to benefits etc.
That is a concern and haven't seen it discussed before. Although one would hope that due to the circumstances Australia will look after everyone including all visitors stranded.
I was also wondering what happens to tourists and visitors inside NZ now, if they can't fly back due to no passenger planes for their location, or their countries borders are totally closed off. I am guessing NZ would look after them through this time?