"They've acknowledged implicitly by not challenging the figure that they spent $1.1 billion more on tax cuts for the wealthy than they took back from GST. Clearly that is borrowed money.
"They've been borrowing to pay for tax cuts. That's irresponsible."
He said he had underestimated the exodus across the Tasman, which he put at 100,000 since National took office.
"The Herald pointed out that it was 113,000 New Zealanders that had left, yet I remember John Key promising that that would come to an end. That hasn't happened. It's got worse.
"John Key promised he would close the wage gap. That wage gap has widened by $32 a week."
Labour later released a point by point response to National's rebuttal, claiming National had had the lowest annual average economic growth in the past 50 years of any New Zealand government.
Labour accepted 60,000 jobs had been created in the last two years, but this was 10,000 less than the number of people who had joined the labour force in that time.
Mr Goff spent yesterday in Hawkes Bay, visiting a Marewa kindergarten, a Grey Power meeting of about 30 people and Future Col.
He received the strongest support talking against National's plan to partially sell state assets, but was challenged on whether Labour's policy of a minimum wage of $15 an hour would hurt small businesses.
He said under Labour New Zealand companies would be more likely to gain government contracts, even if cheaper bids came from overseas companies.
He remained confident despite Labour sliding to 25.9 per cent in a Fairfax Media-Research International poll, taken after last week's leader's debate during which Mr Goff was goaded by Mr Key's cry of "show me the money".