Mr Key responded: "It's those clauses in the current law that are holding back the supply of land and that are making house prices less affordable for New Zealanders."
United Future leader Peter Dunne said he did not have a problem with proposed changes to consenting processes, but altering its principles undermined the environmental values on which the legislation was founded.
His criticism had partly been influenced by conversations with former Prime Minister Sir Geoffrey Palmer, the architect of the original RMA. Mr Dunne was Associate Environment Minister under Sir Geoffrey when the act was introduced.
"To hear his views about what some of the implications for change might be was obviously significant."
Sir Geoffrey released a report yesterday commissioned by Fish and Game which said the Government's proposals would replace core environmental principles with a list of competing considerations which would weaken protection of the natural environment.
"Two decades of case law built up in relation to the interpretation of the act will be rendered redundant."
Proposed changes
• Councils to develop a single planning document for resource consents, with an agreed list of definitions.
• 10-day time limit for straightforward consents.
• New powers for government ministers to take over individual consent decisions.
• Greater consideration to be given to economic development in approving consents.
• Greater consideration of risks posed by natural hazards in approving consents.