The Treaty of Waitangi is a contract signed between two parties – Maori Chiefs and Queen Victoria’s representative.
The contract was intended to bind Queen Victoria and her successors and to bind Maori Chiefs and their successors.
If Maori leaders believe that there has been any breach of the Waitangi contract then they should seek compensation from Queen Elizabeth. If any injustice has been committed by the New Zealand government she is responsible. Her representative, the Governor General, is the overseer of the government and she ultimately has the authority and a duty to ensure the New Zealand government does not act unjustly.
Currently Maori leaders effectively seek compensation from the New Zealand taxpayers.