The New Yorker, Soak The Very, Very Rich, by James Surowiecki:

The fight on Capitol Hill over whether to extend the Bush tax cuts is about many things: deficit reduction, economic stimulus, supply-side ideology. But at its core is a simple question: who counts as rich? The Obama Administration’s answer is that you’re rich if you make more than two hundred thousand dollars a year as an individual or two hundred and fifty thousand dollars a year as a household, and therefore you should have your taxes raised. Conservatives suggest that this threshold is far too low, and argue that Obama would be taxing mostly small-business owners …

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. …

This is one case where simpler isn’t better. In a society that’s becoming more stratified, a sensible tax system should draw more distinctions, not fewer. The U.S. is now a place where the rich and the ultra-rich really inhabit different worlds. (A couple of years ago, Barron’s declared, “Yes, it takes more than $10 million to be seen as rich these days.”) They should probably inhabit different tax brackets, too.