Russia and China bridle at paying UN All Financial Times NewsThe US has sparked protests from Russia and China by proposing a fundamental change to the way contributions to the United Nations are calculated that would make them pay more. The US, the organisation's biggest contributor, wants to shift from a formula broadly based on gross national income (GNI) to one that takes account of purchasing power parity (PPP) – a tool used by economists to compare living standards in different countries more accurately. In testimony prepared for a congressional hearing, before that hearing was delayed, John Bolton, the US...