By Mark John (Reuters) – The combined fortunes of the world’s five richest men have more than doubled to $869 billion since 2020 while five billion people have been made poorer, anti-poverty group Oxfam said. An Oxfam report, which comes as business elites gather this week for the annual World Economic Forum (WEF) meeting in Davos, found that a billionaire is now either running, or is the main shareholder of, 7 out of 10 of the world’s biggest companies. Oxfam called on Monday for governments to rein in corporate power by breaking up monopolies; instituting taxes on excess profit and wealth; a…