"Do any of us think we are really going to get rich selling things to four and a half million New Zealanders?" Mr Key said.
There was a larger than usual representation of Pacific Island delegates from South Auckland seats and Mr Key made special mention of it.
He referred to the imminent departure of former economic development spokesman Shane Jones from Labour - to take up a position as a Pacific fisheries ambassador for the Government.
"If you look at Labour, they have lost the only guy in their caucus who vaguely even cares about economic growth or prosperity or people getting ahead under their own steam."
He said it was critical in the campaign to demonstrate contrast on offer by political parties and opposition by Labour and the Greens to jobs and growth. "You don't need to take my word for it - take Shane Jones' word for it, because that is exactly what he is saying, that there is no point being economic development minister in a Labour-Greens Government that doesn't believe in economic development."
Despite high polling for National, Mr Key said September's election would not be easy to win. "There is absolutely no room in our party for complacency ... we have to fight for every single one of those votes."
Maurice Williamson did not attend the conference.
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