The Prime Minister is being accused of both cynicism and arrogance over his decision not to introduce a wealth tax or capital gains tax as long as he is leader.
Labour's potential coalition partners the Greens and Te Pati Maori are threatening to walk away from any negotiations if a wealth tax isn't put back on the table.
But National and ACT believe the Prime Minister's arm will be twisted.
Political reporter Giles Dexter reports.
