National leadership rivals Todd Muller and Simon Bridges top the list of highest-spending non-ministerial MPs, according to the latest list of expenses.
Between January and March 31 this year, Bridges spent $37,200 on his taxpayer-funded credit card.
This is made up of items such as accommodation and travel costs.
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Bridges is eligible for VIP transportation services and the spending is $5000 less than over the same period last year.