Similarly, with the Hobbit movies, "the Government's enthusiasm for the movies being made here did get in the way of the facts from time to time as deals were struck to ensure the right outcome".
"There is a time-bomb warning to the Government here," said Mr Dunne.
"Support for the cut through approach will wither if it is seen to be a standard proxy for bending the rules or doing special deals to achieve the desired outcome. While the Government is not immediately vulnerable on this issue, the clock has started ticking. And it is worth remembering the adage, the ends do not justify the means."
While the United Future Leader's vote may prove crucial to passing Gambling Act changes required to secure the SkyCity convention centre deal, Mr Dunne indicated he had no objection to supporting it.
Auckland needed the convention centre and Sky City was arguably in the best position to develop it.
"No problem with that, subject, of course, to the specifics of the deal stacking up."