Act leader Jamie Whyte said a Government grant amounted to compulsory financial support for a private event.
The Government has signalled it would likely provide more money to Team NZ if re-elected.
It contributed $36 million to Team NZ's last campaign. An independent evaluation released in March showed a positive impact of $87 million on the New Zealand economy.
Economic Development Minister Steven Joyce said a re-elected National Government would make a decision on funding based on the "economic benefit it would bring to New Zealand, and in particular to our exporters".
Political party leaders also faced Fast Fire questions on inequality.
Growing job opportunities versus direct government assistance are the contrasting approaches from the right and the left to deal with the gap between the rich and the poor.
"Get people into work," said the National Party leader, Prime Minister John Key.
Conservative leader Colin Craig said the issue was about upskilling people through education, rather than welfare.
Labour and the Greens want higher taxes on high incomes to help fund social policies.