New Zealand officials believe too much power is invested in one man, Vernon Pugh, who operates as chairman of the International Rugby Board and its Rugby World Cup Ltd subsidiary.

As New Zealand continues its fight to be re-instated as sub-hosts of next year's World Cup, the chairman of the New Zealand Rugby Football Union, Murray McCaw, has aimed a stinging broadside as Pugh.

McCaw said Pugh has failed to return his calls since Australia said it was going alone and would host all 48 matches of next year's World Cup, claiming New Zealand failed to meet the deadline.

"I would have thought that the head of an organisation such as the IRB would want to talk to me at a time like this," McCaw said.

"I have been disappointed by the lack of communication and consultation. I understand he is a busy man but so are we all. You can't issue documents and expect to get the outcomes you want."

McCaw is continuing to maintain that only the IRB council can strip New Zealand of its status but his claims have been rejected by the Australian Rugby Union and the RWCL.

He said because of Pugh's position as head of both the IRB and RWLC, it ignored the talents of other board members.

"It consolidates the power in one person and means he is able to control things by his influence," McCaw said of Pugh.

"He has too much power."

New Zealand officials are convinced Pugh has over-stepped his authority in the conflict over who will host next year's World Cup and have threatened legal action if they are not re-instated.

Australia has signed the host's agreement but ARU chief executive John O'Neill has admitted it may not be able to deliver 100 percent clean venues.

McCaw also labelled Pugh "a consummate politician" and said he had failed to draw the different parties together during the World Cup dispute.