NZ Billionaire, Owen Glenn said he would be happy to assist in mediating between NZ and Fiji, but NZ first needs to change its "holier than thou" attitude.

Glenn who owns a villa on the island of Malolo Lailai told the NZ Herald it would be up to the government if he took any part, and would depend on the mandate he has.

He also said Fiji's relationship with NZ and Australia needs help from neutral outsiders to prevent further decline.

Glenn, a regular visitor to Fiji since 1959, said any discussions with the Fiji government will be better off without New Zealanders or Australians.

He said the Fiji system is far more complicated than successive NZ governments have realised, and outside help is needed.