I love moral authority as much as the next guy, but the UN’s moral authority is a mighty hard sell given that the UN club includes the most odious regimes in the world, such as Burma. And notice how the UN’s moral authority did not quickly translate into helicopters laden with food and water?
When the UN finally does anything of use, it’s propelled in large part by US dollars, with the US contributing more than any other country. Those other giants, China and Russia, are not filling the coffers of the UN’s moral authority.