Green co-leader Marama Davidson has called on the "bros" to "delete" themselves in a Twitter rant criticising the treatment of ethnic communities in New Zealand.

In a late-night tirade, Ms Davidson said ethnic communities had been treated like "economic units" long before the release of secret phone recordings by former National MP Jami-Lee Ross highlighted an alleged cash-for-candidate system.

On the audio, Mr Ross and National Party leader Simon Bridges discuss the value of Asian members of Parliament, including the potential candidacy of two Chinese individuals after an alleged large donation from businessman Zhang Yikun.

In her tweets, Ms Davidson said "white immigrants" had never been "slayed" by the same derogatory or dehumanising abuse as Asian citizens or people of colour.

"Under this long-standing false narrative, struggling and marginalised communities have been pit against each other," Ms Davidson wrote, saying people shouldn't be surprised by the revelations coming out of the National Party.

Admitting she was "p*ssed", Ms Davidson kept her most brutal comments for the political analysts she labelled as the "bros" that "cover up power abusers".

"Get out. Delete yourselves," she said.

She later also joked she may try to introduce a Member's Bill to ban "white-person tofu".