Criticisms of Labour's latest election promise are rising.

The party's promising to axe GST from fresh and frozen fruit and veggies from April, with the average household expected to save roughly $20 a month.

But New Zealand Initiative Chief Economist Eric Crampton told Kate Hawkesby that these policies always end up costing more in revenue than they deliver to families, and make the tax system more complex.

He says the accounting gets more difficult, and lawyers have a field day on definitions of what's included and what isn't.

Labour's also promising to boost In-Work Tax Credits by $25 a week, and lift the Working for Families abatement threshold.

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Criticisms of Labour's latest election promise are rising.
The party's promising to axe GST from fresh and frozen fruit and veggies from April, with the average household expected to save roughly $20 a month.
But New Zealand Initiative Chief Economist Eric Crampton told Kate Hawkesby that these policies always end up costing more in revenue than they deliver to families, and make the tax system more complex.
He says the accounting gets more difficult, and lawyers have a field day on definitions of what's included and what isn't.
Labour's also promising to boost In-Work Tax Credits by $25 a week, and lift the Working for Families abatement threshold.
LISTEN ABOVE

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A fresh and intelligent start to your day - catch the very latest international and domestic news developments, sport, entertainment and business on Early Edition with Ryan Bridge, on Newstalk ZB.