High food and fuel prices threaten the sustainability of existing social protection programmes from two sides. The costs of food assistance and energy subsidies increase, while at the same time government revenues from taxes and tariffs decrease (Ortiz et al. High consumer prices erode the value of cash transfers thereby further reducing the already meager impact of these programmes (Ortiz et al. 2011).The systems are characterized by large exclusion errors and in some countries sizeable inclusion errors.