How Tax Battles Push Billionaires Out of Big Cities

Billionaire Ken Griffin has sent a clear warning to cities that push high earners too hard: they might not like where their policies lead. After dismantling his Chicago operation in 2022, he’s now in a direct clash with New York’s Mayor Zohran Mamdani over taxes aimed at the ultra-rich. Griffin’s move from Chicago to Miami wasn’t just about saving money. It showed how quickly top businesses—and their jobs—can vanish when leaders treat wealth creators like enemies. Griffin, with a net worth of around $50 billion, built Citadel into one of the world’s biggest financial firms in Chicago. For over 30 years, the city benefited from his company’s presence—high-paying jobs, donated millions to local institutions, and a boost to Chicago’s reputation as a finance powerhouse. But as crime rose and policies grew less business-friendly, key employees followed Griffin south. Today, Citadel’s Chicago office has dwindled to just a few hundred people. Griffin himself has called Chicago’s decline a "sad story, " noting that many talented workers gave up their homes and networks just to leave.Now New York faces its own tough choices. Mamdani’s viral video targeting Griffin’s $238 million Central Park penthouse wasn’t just political posturing. It put a bullseye on the ultra-wealthy, proposing an annual fee on luxury second homes worth over $5 million. Griffin didn’t stay quiet. He called the video "creepy and weird" and admitted he watched it multiple times. Meanwhile, Citadel is pausing a planned $6 billion office tower in Manhattan while rapidly expanding in Miami, a city known for low taxes and high growth. The battle isn’t just about tax rates. It’s about a growing split between progressive city leaders who want to redistribute wealth and business leaders who want stability. Chicago’s experience shows what happens when they clash. New York now risks repeating the same story—unless both sides find a middle ground. How far will cities push before their economic engines start leaving? And will taxpayers fill the gap when high earners and their investments depart?