Norway's first female prime minister Gro Harlem Brundtland of the Labour Party continued many of the reforms of her Conservative predecessor, while backing traditional Labour concerns such as social security, high taxes, the industrialisation of nature, and feminism. By the late 1990s, Norway had paid off its foreign debt and had started accumulating a sovereign wealth fund. Since the 1990s, a divisive question in politics has been how much of the income from petroleum production the government should spend, and how much it should save.