National’s finance spokesman Steven Joyce announced his resignation from Parliament on Tuesday, and claims rival MPs have been 'climbing over him' to get new roles.
Mr Joyce is exiting politics after 10 years in power - and just a week since he failed to win the National Party leadership.
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He joined the AM Show to discuss his big leave and the future of the National Party.
He denies the reason he lost was because he was out of touch with the caucus, which went with Simon Bridges. Mr Bridges subsequently stripped Mr Joyce of his coveted finance portfolio.
"That's spinning from a couple of people that actually want to climb over me and get a new role.
“And good on them for that because now they get their chance."
Mr Joyce defended his claim of an $11.7 billion hole in Labour's fiscal plans, which drew criticism during National’s 2017 election campaign.
He says he anticipates that the hole will appear over the next four years.
"It's there. You can just see it every day in Grant Robertson's panic about where he's going to find the money to do all the things that his mates have promised," he argues.
"This guy has got a real problem. He's spent whatever money he had on first-year tertiary students. He's got Winston going out demanding more aid money.
"Let's face it - Winston appointed the Prime Minister so Winston gets what Winston wants."
Watch the full interview with Steven Joyce above.
The AM Show with Duncan Garner, Amanda Gillies and Mark Richardson, weekdays 6-9am on RadioLIVE and streaming live to the rova app on Android and iPhone.