In the years following 1995 oil and natural gas prices continued to rise generating significant royalty revenue for the province. Klein's new challenge was convincing the public to "reinvest" in recently cut public services while maintaining the his fiscally conservative reputation. Government spending increased dramatically, rising 60 per cent between 1997 and 2001 which garnered rebuke from former administration allies such as the Canadian Taxpayers Federation and other conservative thinktanks. Klein sought to reinvent government in Alberta as a streamlined and efficient operation which heavily relied on privatization and contracting. Progressive Conservatives brought in Ted Gaebler the co-author of "Reinventing Government" and controversial former New Zealand Labour government Treasurer Roger Douglas to advise on the sweeping reforms.