An IRD report which shows the country's richest families have a median effective tax rate of less than 10 percent while the average New Zealander pays about 20 percent.
David Parker told Morning Report the ongoing exclusion of gains from property, businesses and stocks is unrealistic and unfair.
National Party leader Christopher Luxon is adamant despite the IRD findings the existing tax system is 'broadly fair' and the existing progressive tax system is the right way to go.
Andrew Dickeson, a taxation services director at Baker Tilly Staples Rodway, spoke to Ingrid Hipkiss.
