The Panama Papers affair has widened, with a huge database of documents relating to more than 200,000 offshore accounts posted online. The papers belonged to Panama-based law firm Mossack Fonseca and were leaked by a source simply known as John Doe". The documents have revealed the hidden assets of hundreds of politicians, officials, current and former national leaders, celebrities and sports stars. They list more than 200,000 shell companies, foundations and trusts set up ... around the world. Offshore companies are not illegal but their function is often to conceal both the origin and the owners of money, and to avoid tax payments. 11.5 million documents [were] originally given to the German newspaper, Sueddeutsche Zeitung. The paper allowed the ICIJ to have access. Hundreds of journalists ... then worked on the data. Their reporting was published last month. On Monday, 300 economists signed a letter urging world leaders to end tax havens, saying they only benefited rich individuals and multinational corporations, while boosting inequality. Last week, "John Doe" issued an 1,800-word statement, citing "income equality" as his motive [for leaking the documents]. He said: "Banks, financial regulators and tax authorities have failed. Decisions have been made that have spared the wealthy while focusing instead on reining in middle- and low-income citizens." He revealed he had never worked for a spy agency or a government and offered to help law authorities make prosecutions in return for immunity.