"A knee-jerk border closure sends a clear but terrible message to investors and nationally focused employers that there can be no regulatory certainty to doing business in Australia.
"These outbreaks are sadly inevitable for a long time to come and they should and can be dealt with locally. They are a challenge for states to show that their testing and tracing systems are good enough to meet small and localised outbreaks. By closing their borders, states are making it clear they have no faith in their systems and are prepared to inflict enormous economic pain on each other and themselves.
"The agreed national strategy sensibly does not aim for elimination and states that go for this approach are following a road to economic ruin," Mr Willox said.
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