Some billionaires are satisfied with buying themselves an island. Bill Gates got a United Nations health agency in Geneva. The world's richest man has become the World Health Organization's second biggest donor, second only to the United States. This largesse gives him outsized influence over its agenda. The result, say his critics, is that Gates' priorities have become the WHO's. When Gates started throwing money into malaria eradication, top officials - including the chief of the WHO's malaria program - raised concerns that the foundation was distorting research priorities. "The term often used was 'monopolistic philanthropy', the idea that Gates was taking his approach to computers and applying it to the Gates Foundation," said a source close to the WHO board. "He is treated liked a head of state, not only at the WHO, but also at the G20," a Geneva-based NGO representative said. Some health advocates fear that because the Gates Foundation's money comes from investments in big business, it could serve as a Trojan horse for corporate interests to undermine WHO's role in setting standards and shaping health policies. The Gates Foundation has pumped more than $2.4 billion into the WHO since 2000. Dues paid by member states now account for less than a quarter of WHO's $4.5 billion biennial budget. The rest comes from ... governments, Gates, other foundations and companies. Since these funds are usually earmarked for specific projects or diseases, WHO can't freely decide how to use them.