According to RNZ:
Official papers confirm low income families will be worse off under the National Government’s tax cut package, compared with Labour’s.
Radio New Zealand‘s political editor says papers obtained under the Official Information Act, also show higher earners will be better off. From April 2011 a person with children earning $40,000 per year will pay $250 more per year in tax than if Labour had stayed in power. The less money earned, the bigger the loss.
However, someone earning $100,000 will be $750 per year better off than under Labour. Low income single workers, who don’t get the Working for Families tax credits, will also be much better off. A single person earning $40,000 will get an extra $530 per year by 2011 under the Government’s package.
You can listen here to the item regarding it (which was on Morning Report).