By definition member states don't have oversight over the UN, though they can refuse or delay funding (as the US has done in the past). Technically, the UN Secr

By definition member states don't have oversight over the UN, though they can refuse or delay funding (as the US has done in the past). Technically, the UN Secretary General and the Office of Internal Oversight Services are responsible for ensuring effective, efficient and transparent operations. In reality, much of the UN evades oversight due to the highly-politicized bureaucracy. There are plenty of good efforts coming out of the UN -- I've seen the results of UNHCR's work in the developing world, and UNICEF does much good work, even if some of their policies have been, to put it mildly, controversial in intent and implementation -- but much, perhaps most, of the UN's work is of dubious cash value to the international system.