National is picking apart a policy it's predicting Labour is about to announce.

The Opposition claims Labour will remove GST from fruit and vegetables.

Deputy Leader Nicola Willis says Labour is good at promising things that sound good on the tin.

But she says it's terrible at delivering, especially anything complicated.

"Inevitably, the problem is if you don't do it right, none of the money actually ends up in the back pocket of the people we all want to help."

Chris Hipkins says Willis will have to wait for Labour's proposals to be announced, like everyone else.

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