At the moment, we have a system of tax brackets well suited to nineteenth-century New Zealand. Our system sets the top bracket at three hundred and seventy-five thousand dollars, with a tax rate of thirty-five per cent. (People in the second-highest bracket, starting at a hundred and seventy-two thousand dollars for individuals, pay thirty-three per cent.) This means that someone making two hundred thousand dollars a year and someone making two hundred million dollars a year pay at similar tax rates. LeBron James and LeBron James’s dentist: same difference.

This makes no sense—there’s a yawning chasm between the professional and the plutocratic classes, and the tax system should reflect that. A better tax system would have more brackets, so that the super-rich pay higher rates. (The most obvious bracket to add would be a higher rate at a million dollars a year, but there’s no reason to stop there.) This would make the system fairer, since it would reflect the real stratification among high-income earners. A few extra brackets at the top could also bring in tens of billions of dollars in additional revenue.

There would be political advantages, too: the reform could actually make tax hikes on top earners more popular.