As Nicholas Shaxson explains in his fascinating book Treasure Islands, the Corporation exists outside many of the laws and democratic controls which govern the rest of the United Kingdom. The City of London is the only part of Britain over which parliament has no authority. In one respect at least the Corporation acts as the superior body: it imposes on the House of Commons a figure called the remembrancer: an official lobbyist who sits behind the Speaker's chair and ensures that, whatever our elected representatives might think, the City's rights and privileges are protected. The mayor of London's mandate stops at the boundaries of the Square Mile. There are, as if in a novel by China Miéville, two cities, one of which must unsee the other.
Several governments have tried to democratise the City of London but all, threatened by its financial might, have failed. As Clement Attlee lamented, "over and over again we have seen that there is in this country another power than that which has its seat at Westminster." The City has exploited this remarkable position to establish itself as a kind of offshore state, a secrecy jurisdiction which controls the network of tax havens housed in the UK's crown dependencies and overseas territories. This autonomous state within our borders is in a position to launder the ill-gotten cash of oligarchs, kleptocrats, gangsters and drug barons. As the French investigating magistrate Eva Joly remarked, it "has never transmitted even the smallest piece of usable evidence to a foreign magistrate". It deprives the United Kingdom and other nations of their rightful tax receipts.