If CV-19 spreads everywhere then there will be no economy and the whole country will be back in lockdown.
What we have seen is that eradication is the only way to fully open the economy. Suppression does not work in the long term, 1 case will always become 2, becomes 4 etc...
NZ domestic demand is back up to 70% of pre covid, whats Australia ? 5 - 10%? Less?