New evidence shows middle income families are worse off under National and income inequality is at a record high, the Greens say.
Co-leader Russel Norman is citing the Ministry of Social Development's latest household incomes report, produced annually.
"It shows that incomes for middle income New Zealanders fell, only the wealthiest saw their incomes rise and that inequality is at its highest level ever," he said on Thursday.
"It proves what the average mum and dad and their family has felt for a while - they are financially worse off under this government."
Dr Norman says the report shows the income of mid-range families fell by three percent, while cuts to the top tax rate helped high income earners.
"Middle New Zealand is being ground down by Government policies... it is deeply concerning that our society has never been as unequal as it is today."
NZN