Although the overall technical efficiency of the system has increased considerably, mainly due to the introduction of output-based payment systems, allocative efficiency remains a problem. Considerable variations exist in service delivery both geographically and by specialization, and equity of access is far from being realized, a fact which is mirrored in differing health outcomes for different population groups. A key problem is the continuing lack of an overarching, evidence-based strategy for mobilizing resources for health, which leaves the health system vulnerable to broader economic policy objectives and makes good governance hard to achieve. .