Rupert Murdoch’s secret succession drama is a warning to rein in the super-rich | Will Hutton

Media mogul's bid to extend rightwing influence beyond the grave should be resisted to the last

We live in an era of private dynasties. America's billionaires are worth a cool $5.5tn at the last count. Three - Amazon's Jeff Bezos, Tesla's Elon Musk and Facebook's Mark Zuckerberg - are worth over a staggering $500bn between them. Americans dominate the global billionaire league table: Britain has none in the top hundred. But we still have enough to cause concern.

Individuals who have resources on this scale change the dynamics of the economies and societies in which they live, as the US increasingly dramatises. Their spending pulls economies out of kilter so that too much production is directed towards opulent, useless baubles, but, more dangerously, it spills over into buying political influence - directly in the political process and indirectly via media ownership. Unconstrained, the impact can only grow in the decades ahead, a phenomenon of which the dynastic founders are well aware, even if the wider public is not.