Jeff Bezos, Michael Bloomberg and Warren Buffett are three of the richest people in the world, but they pay little in income tax relative to their wealth. In 2021, ProPublica published an investigation built on leaked tax documents that reveal what some of the richest Americans really pay — or don’t. Warren Buffett had a true tax rate of 0.1 percent. Jeff Bezos: 0.98 percent. Michael Bloomberg: 1.3 percent. Ultra-wealthy Americans have essentially been written out of the tax system. “It’s wrong as a matter of principle. It’s wrong because we need their money. It’s wrong as a matter of fairness. It is wrong for so many reasons,” the law professor Ray Madoff told me. She’s the author of the new book “The Second Estate: How the Tax Code Made an American Aristocracy,” and she’s interested in helping people understand how broken the American tax system is and how to fix it. In this conversation, we discuss the techniques the ultra-wealthy use to evade the tax system, why they think “salaries are for suckers” and what tax reform could look like. Mentioned: “The Secret IRS Files: Trove of Never-Before-Seen Records Reveal How the Wealthiest Avoid Income Tax” by Jesse Eisinger, Jeff Ernsthausen and Paul Kiel The Second Estate by Ray D. Madoff Taxation: The People’s Business by Andrew W. Mellon Philanthrocapitalism by Matthew Bishop and Michael Green Book Recommendations: The Age of Extraction by Tim Wu The Rise and Fall of the Neoliberal Order by Gary Gerstle Crossroads by Jonathan Franzen Thoughts? Guest suggestions? Email us at ezrakleinshow@nytimes.com. You can find transcripts (posted midday) and more episodes of “The Ezra Klein Show” at nytimes.com/ezra-klein-podcast, and you can find Ezra on Twitter @ezraklein. Book recommendations from all our guests are listed at https://www.nytimes.com/article/ezra-klein-show-book-recs. This episode of “The Ezra Klein Show” was produced by Rollin Hu. Fact-checking by Michelle Harris. Our senior engineer is Jeff Geld, with additional mixing by Aman Sahota. Our recording engineer is Aman Sahota. Our executive producer is Claire Gordon. The show’s production team also includes Marie Cascione, Annie Galvin, Kristin Lin, Emma Kehlbeck, Jack McCordick, Marina King and Jan Kobal. Original music by Pat McCusker. Audience strategy by Shannon Busta and Lauren Reddy. The director of New York Times Opinion Audio is Annie-Rose Strasser. And special thanks to Edward Fox.