“So I just urge NSW to look at the model that works … and that would be good for the nation.
“We’re very sympathetic and supportive of our NSW brothers and sisters but [the outbreak is] debilitating for the country.
“It’s debilitating for everyone else, so the sooner NSW crushes it, the sooner they kill it, the better it is for them and the better it is for the entire country.”
SA adopted the “third ring” strategy for its November outbreak, which was used in the waning days of Victoria’s lockdown.
The strategy sees not only close contacts of COVID-19 cases go into self-isolation for 14 days but also close contacts of those close contacts.
About 5000 people went into quarantine in SA after a community outbreak involving one family quadrupled to 17 people over one night, sparking nationwide state border changes.
Mr McGowan said while it would be a tough and difficult decision to bring in more rules in NSW, it was better than drifting along with continual outbreaks.
“I think the model of keeping the virus out and not having it and killing it where you can is better than having the virus and constantly chasing your tail,” he said.
“If you get rid of the virus you have better economic outcomes. Look at WA, we haven’t had a case for 251 days. Strongest economy in the nation.”
The NSW government has taken an approach of staying open as much as possible and has been the least likely state to change its border arrangements when there are outbreaks in other jurisdictions.
NSW Premier Gladys Berejiklian said on Friday there was concern the northern beaches cluster might have already spread to other parts of Sydney from venues where symptomatic COVID-19 infected had visited.
“A couple of people at those venues weren’t from the northern beaches [and] they’ve gone back to their home, back to their other suburbs,” she said.
“It does mean this potential seeding outside of Avalon and outside of the northern beaches and this is what we need to prevent.”
Genome sequencing has shown the northern beaches outbreak originated from a US strain.
NSW has taken more than 100,000 returned international travellers into its hotel quarantine program, the most individuals of any state.
Peter de Kruijff is a journalist with WAtoday.