The National Party wants Covid-19 rule-breakers to be slapped with tough sanctions after Auckland was plunged back into a level 3 lockdown.
Multiple people in the February cluster have flouted the self-isolation directives: the latest, a 21-year-old who visited numerous locations while potentially infectious.
On Sunday,Prime Minister Jacinda Ardern announced health officials would work with police to keep tabs on those who'd been instructed to isolate.
National's Covid-19 response spokesperson Chris Bishop said that was a good move, but the Government needed to go further.
He told RNZ that New Zealand's "high-trust model" was starting to break down and a new approach was called for.
"It is time to start knocking on people's doors and making sure that when people are meant to be isolating for two weeks, they actually are doing so," Bishop said.
"And if they're not, let's appropriately punish them and make sure people know about that so other people don't do it as well."
"People haven't felt the pressure to follow the rules because there are no sanctions."
"Other countries have faced similar problems," he said. "Taiwan does have strict requirements around self-isolation and the key point there is they actually go and check and that's not really what's happening at the moment ...
"We should be going to check up on those people, we should be calling them, we should be knocking on their door, and potentially looking at video-conferencing them."
Bishop said the priority now was identifying cases within the community and eliminating the virus. "We said on February 17 it was a big call to take Auckland out of level 3 and go down to level 2 ... but what's really important now is we focus on identifying and getting around this cluster as quickly as possible."
He said there was a need to roll-out rapid antigen testing and waste-water testing, which he said was a cheap and fast way of identifying cases within the community during a lockdown. It would be particularly useful in South Auckland.
But Auckland University microbiologist Dr Siouxsie Wiles warns that a punitive approach could backfire.
"The last thing we want to do is create an environment where those who've broken the rules don't come forward for testing or mislead the contact tracers about where they've been or who they've been with. We really need people to cooperate to get through this."
Wiles said the public should also try to understand the reasons why people might not isolate.
"There might be those who have fallen for all of the disinformation circulating around social media," she said. "We might be misplacing our anger."
