Microsoft Corp. co-founder Bill Gates started the last decade worth more than $50 billion and with a pledge to donate large parts of his fortune to charity.
By the end of the decade, he’d given billions of dollars to fight poverty and improve health care and education. But his fortune also more than doubled during the period, a result of soaring stock markets and favorable tax policies.
And so at the end of the decade, the world’s second-richest person said he wants his fellow billionaires to pay much higher taxes.

U.S. lawmakers should close loopholes, raise the estate tax and hike the capital-gains tax so that it equals the rate on labor income, Gates wrote Monday in a year-end blog
“I’ve been disproportionately rewarded for the work I’ve done — while many others who work just as hard struggle to get by,” he wrote. “That’s why I’m for a tax system in which, if you have more money, you pay a higher percentage in taxes. And I think the rich should pay more than they currently do, and that includes Melinda and me.”
Gates, 64, has a net worth of $113.7 billion, according to the Bloomberg Billionaires Index, a ranking of the world’s 500 richest people. In 2010, Bill and Melinda announced the Giving Pledge with Warren Buffett and asked other billionaires to sign to give away chunks of their fortunes. As of May, 204 people from 23 countries
At an event in November, Gates expressed
“But I believe we can make our system fairer without sacrificing the incentive to innovate,” he said. “Americans in the top 1 percent can afford to pay a lot more before they stop going to work or creating jobs. In the 1970s, when Paul Allen and I were starting Microsoft, marginal tax rates were almost twice the top rate today. It didn’t hurt our incentive to build a great company.”
— With assistance from Sophie Alexander