Finance Minister Nicola Willis has described superannuation as a 'time bomb' that is here now and political parties need to be honest about it.

Delivering the Budget today, Willis said National will enter the election with changes to ensure superannuation is affordable. 

NZ First's Shane Jones has confirmed the party's not budging on this issue.

"The reality is, our economic growth rate...is quite anaemic. Under three percent, that's in the Treasury forecast. We need to do a hell of a lot more as a country, irrespective of who the the Government is, to substantially grow the economy and boost our revenue." 

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