The only people on the rich list are the parvenus like Bill Gates and Jeff Bezos. The really rich seem to hide their money in various trusts, and avoid paying taxes on their wealth. I read a report by an ex-banker who estimated that almost half of the total wealth of the world is controlled by the City of London. Of course this is done through a variety of trusts in tax havens such as Jersey, The Cayman Islands and others. Property is hidden by using a hierarchy of holding companies and trusts ( a British invention ). There is even a name for it, it is called "The veil of Tiers".