An IRD investigation into the wealth of New Zealand's richest 311 families found they paid an effective tax rate of just 9.5%, less than a third the 30% effective rate being paid by single PAYE-taxpaying renter on $80,000 a year. This week Bernard Hickey talks to the report’s commissioner, revenue minister David Parker, to break down what the report says and discuss the fairness New Zealand's current tax system.

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