The most notable feature of New Zealand politics at the time was the economic change promoted by the Finance Minister, Roger Douglas. Douglas was advancing monetarist policies involving extensive privatisation of state assets and the removal of tariffs and subsidies—these reforms were dubbed "Rogernomics". These policies, which contravened Labour's basic policy platform and campaign promises, were deeply unpopular with Labour's traditional support base, and resulted in a confrontation between Prime Minister David Lange and Roger Douglas. Lange also reneged from his promise to hold a binding referendum on the MMP system. Palmer conceded defeat on MMP at an April 1989 Labour regional conference, saying that the issue was "effectively dead for the immediate future." Eventually, Douglas was removed from Cabinet, but the dispute had weakened Lange enough that he resigned a month later. Palmer, being deputy leader, took over as Prime Minister. Electoral reformers in the Labour Party kept up the pressure, and in September 1989, after Palmer had become prime minister, the full annual conference of the Labour Party passed a remit endorsing a referendum on the principle of proportional representation.