More information is to be released on how much the rich are paying in tax.
The Inland Revenue report will estimate the effective tax rate of the country's wealthiest - taking into account their full economic income, rather than just taxable income.
PwC Partner Geof Nightingale says the tax system is collecting adequate revenue and there's no revenue crisis, even with cyclone expenses.
He told Mike Hosking the report will spark a new tax.
Nightingale says a new tax would be very complicated and take a long time - so he thinks it's highly unlikely.
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