Whenever I ponder the enormity of the multitrillion-dollar industry known as private equity, I picture the lavish parties thrown by Stephen Schwarzman – and then I think of the root canals. Schwarzman is the billionaire impresario of Blackstone, the world’s most colossal private equity firm. In August, he hosted a 200-person housewarming party at his $27m (£21m) French neoclassical mansion in Newport, Rhode Island. It was a modest affair compared to the grand soiree he threw himself at his Palm Beach, Florida, estate for his 70th birthday, in 2017. That black-tie bash was itself a sequel to his multimillion-dollar 60th, in 2007, which became a symbol of the sort of Wall Street excess that led to the global financial crisis. The Palm Beach party, which some reports say cost more than $10m, featured Venetian gondolas, Arabian camels, Mongolian acrobats and a giant cake in the shape of a Chinese temple. “Brilliantly stimulating” was the billionaire industrialist David Koch’s review. Gwen Stefani serenaded Schwarzman as Jared Kushner, Ivanka Trump and several members of her father’s cabinet looked on. It was a world in miniature, ruled over by a modern Croesus – the perfect symbol for a form of money-making that has infiltrated almost every facet of modern life. READ MORE