Labour leader David Cunliffe is pouring scorn on United Future's list of requirements for its support in a post-election deal.
United Future leader Peter Dunne has effectively ruled out helping Labour form a government after next year's election, saying its tax policies would be a major obstacle.
In order to win his support, he says, Labour would have to scrap its plans to raise taxes and introduce a capital gains tax.
But Mr Cunliffe says Mr Dunne is in no position to lay down the law after attracting only 30 members to his party's annual conference on Saturday. He says Peter Dunne is a legend in his own lunchtime and won't be around Parliament for much longer.