Extreme wealth has always played a role in democracies. Money has always talked, especially in the US. Years ago, Lawrence Lessig, the great legal scholar, calculated that most of the campaign funding for members of Congress and aspiring politicians came from one-twentieth of the richest 1% of Americans – about 150,000 people. This is about the same number as those who are named “Lester” and explains the title of his book: The USA Is Lesterland. But that particular corruption of American politics only involved billionaires like the Koch brothers playing organ-grinders to congressional monkeys. The obscene wealth generated by the...