The Green Party wants to bolster Kiwibank's capital so it can "really take on the Aussie banks".
In a pre-Budget media briefing yesterday Greens co-leader Russel Norman said the Government had failed to rebalance the economy and that the profits of the big four banks, all Australian-owned, were strip-mining the country of much needed capital and contributing to its largest economic vulnerability - chronic large current account deficits and mounting foreign debt.
"We would strengthen Kiwibank by allowing it to retain more of its earnings so it can grow faster," Norman said.
And if it needed the injection of more capital "we would be open to that".
"We want to help build Kiwibank into a sophisticated retail and commercial bank with the scale needed to lend to productive enterprise and be able ultimately to manage the biggest bank account in the country, the Government's."