Mr Crimp said this week he was backing a campaign launched by John Ansell, who was behind National's 2005 "Iwi/Kiwi" billboards.
On his website, Mr Ansell said he hoped his "Treatygate" campaign would raise awareness about what he called "racial favouritism", culminating in a referendum at the 2014 election asking voters: "Do you want New Zealand to be a Colourblind State, with one law for all, and no racial favouritism of any kind?"
He wanted to raise $2 million for the campaign, to fund a "powerful public education campaign" to expose the Treaty of Waitangi process as a "sustained and orchestrated con".
Mr Crimp, who was quoted in May as saying Maori were "either in jail or on welfare", said he would be putting some of his money into the campaign.
He said he had been told by Mr Ansell not to reveal how much he was giving, saying only it would be a "few quid".
Mr Ansell had taken up the mantle left vacant by former Act and National leader Don Brash and he hoped the campaign would put a stop to "special benefits for Maori", he said.
He went on to say that the favouritism Maori received in New Zealand was comparable to apartheid-era South Africa.
"[Maori] leaders are greedy and they are claiming for everything they can think of. They are claiming for the shrubs, trees and mountains and rivers."
Asked if it was important to recognise Maori culture, he said: "What is Maori culture ...
the culture they had before the white man came was killing each other and eating each other."
Co-leader of the Maori Party Pita Sharples said people were sick of Mr Ansell's "divisive campaigns" and it was a pity he could not use his expertise "more constructively".
On the proposed referendum question, Dr Sharples said: "Who wants to be colour-blind? New Zealanders prefer the vibrant colours, flavours and sounds of a multicultural society to the dull grey of uniformity."
Mr Ansell said he was happy to accept Mr Crimp's support.
"There's nothing that Louis has said that I don't pretty much agree with and I think the majority of the public probably do too." He was confident the campaign would be a success, and said the public was "sick and tired" of favouritism towards Maori.
