The richest 10 per cent of New Zealanders are wealthier than the rest of the population combined, according to figures cited by Oxfam NZ.
The charity says the numbers illustrate a stark wealth gap in New Zealand, which is deeply worrying - and wants multinational corporate tax avoidance addressed.
However, the Government says its own analysis shows inequality has not worsened in the past decade, and the system already redistributes a significant amount of income.
Rachael Le Mesurier, Oxfam NZ's executive director, disagreed, and said we were becoming more divided, "with an elite who are seeing their bank balances go up, while hundreds of thousands of New Zealanders struggle to make ends meet".
Oxfam says data from the 2013 Credit Suisse Global Wealth Databook also shows that the top 1 per cent of Kiwis hold more wealth (25.1 per cent) than the bottom 70 per cent.