The Herald reports:Christopher Luxon says he supports having another referendum on the MMP voting system if he’s re-elected as he encourages greater support for National so the party can avoid working with “some yahoo and numpty” in Cabinet. It is unclear if this is merely a desire by the Prime Minister, or official National Party policy. In 2011, 18 years later, there was another referendum where NZers voted 58% to 42% to keep MMP. It was right to have a second referendum to confirm if NZers were happy with how MMP had worked out. There is no hard and fast rule, but I would suggest you would only have such a referendum every 30 years or so.