Non-payment of dues is an infringement of international law.  Members of the UN are obligated by treaty to contribute. In fact, ten nations (all in Africa, Central Asia or the Caribbean) are being threatened with the loss of their General Assembly votes for arrears this year. These states are required to make far smaller contributions in total than the gaps often left unfilled by the USA. As of 2009 the US debt to the UN exceeds $ 1.5 billion [1]. Therefore the UN is more or less dependent on US payments. While the US does eventually contribute its dues, and the UN voluntarily complies with its demand to keep a level budget, the threat they hold over the UN is essentially a breach of treaty and should be treated as such.  [1]