Some Recognised Seasonal Employer contractors are of the opinion that there is a bit of a 'Hawke's Bay mafia' in regard to the RSE scheme.
National Party immigration spokesman Stuart Smith said the sentiment had to do with the number of RSE workers allocated to the Hawke's Bay area.
RNZ understood an Immigration New Zealand investigation into a corruption complaint, related to the RSE scheme which brought thousands of Pacific Island workers to work on farms and orchards every year.
Smith said a staff member was being investigated and other people had been stood down.
The investigation grounds were unclear, but RSE contractors had their suspicions, he said.