For child poverty campaigners the Institute for Public Policy Research (IPPR), the news that Carey Oppenheim has been appointed co-director of leading think-tank, alongside former child poverty tsar Lisa Harker, must have been akin to winning the lottery. Oppenheim has a distinguished history having worked previously at IPPR, for the government and within Number 10 on the issue of child poverty, families and welfare. More recently she has headed the London Child Poverty Commission, a role she will continue alongside her work at IPPR. But while the children's sector may greet Oppenheim...