The National-led Government claims it is cutting the wage gap with Australia, despite official statistics revealing that the gap has widened.
But the Government used a different set of figures during Question Time in Parliament on Wednesday to rebut Labour Party claims it has done nothing to close the gap.
Labour says official figures show the gap between average wages in the two countries has increased by nearly $NZ60 a week since the last election.
Prime Minister John Key produced a different set of figures which took into account purchasing power, showing the gap was smaller than 2005.
But even Mr Key's figures show the wages gap under National has risen compared with Labour's last year in office.
In fact, in both 2009 and this year, the gap highlighted by Mr Key's figures had increased after falling for three consecutive years under Labour.