France’s experiments with taxing the wealthy at very high rates didn’t raise much money and didn’t prove politically sustainable. The flight of wealthy individuals from the country probably helped reduce inequality on paper, but it's not clear that their departure left France better off.
It’s possible that similar tax experiments in the U.S. might be more successful than in France. The U.S. economy is much larger than France’s; although a French business owner who moves to Belgium can still do business and move about freely within the European Union, an American mogul who moves to Canada might find access to one of the world’s largest markets restricted. That might allow the U.S. to raise more money from high taxes than France ever could.
But it’s also worth noting that France’s wealth tax and supertax ultimately weren’t that important. Despite repealing the supertax, France managed to increase government revenue and to reduce inequality. The end of the wealth tax will probably be a similar story. France simply didn’t need these flamboyant taxes on the rich to have very high levels of taxation and social spending. That means the U.S. probably doesn’t need them either. Tax increases across the board -- on top incomes, capital gains, estates, pass-through businesses, corporations, and so on -- might not excite populist firebrands, but they’re probably a more effective strategy for fighting inequality.
Noah Smith is a Bloomberg Opinion columnist. He was an assistant professor of finance at Stony Brook University, and he blogs at Noahpinion.