Ensuring efficiency in resource use is a complex issue that should address questions on how to reduce waste and corruption; what interventions should be available for the existing resources; whether services should be provided by the government or purchased from the non-government sector; how providers (e.g. health workers, hospitals, etc.) should be paid to ensure quality and efficiency; and whether specific types of services or incentives should be targeted at the poor. Thus, because of the multiple dimensions, it is not particularly easy to define a single, easily understandable indicator of efficiency for health system financing.