I think you inadvertently demonstrate my point.
If we look at the US as the touchstone of honest dealing, then the game is already rigged. The US rated 73 in the 2013 Corruption Perceptions Index, placing 19th, and was behind Canada (9th at a CPI of 81) and Denmark (1st at a CPI of 91). It gets worse, however. The median CPI for the 175 countries listed was 38, held by Bukina Faso, Jamaica, Liberia and Zambia, among others. Half of the countries rated even worse, with Afghanistan, North Korea and Somalia at the bottom with a CPI of only 8. Here's the thing: how can we expect the UN to be free of corruption when it is populated by countries where corruption is endemic?
It is easy to think that the IPCC is aboveboard because "science", but there are reports that the IPCC deliberately excluded input from climate scientists who did not follow the IPCC's narrative. That is not science, but corrupt practice. In the West, it is commonplace for committee reports, court rulings and the like, to include dissenting views, as a matter of transparency. The IPCC clothes itself in the garments of undeniable truth, but underneath is putrid corruption.