Well they will have to pay BOTH taxes
singlecut.
If they are in NZ for 183 days or more they will have to pay both taxes then?
If they work in Australia regardless who they work for they will have to pay Australian taxes. It doesn't matter that its an NZ company or they are contractors, they work in this country, they pay in this country.
Not going to be much in the ktty for the punters if both countries have their hand in the till.
Banger