Bill Gates and Warren Buffett got 211 billionaires to pledge half their wealth to charity. Now some are falling short — and still getting massive tax breaks.

Main Idea: The article says Mark Zuckerberg and other billionaires promised to give away much of their wealth, but many are donating slowly while still getting large tax breaks.

Key Points:

• Bill Gates and Warren Buffett helped launch the Giving Pledge, which asked wealthy people to give at least half their money to charity.
• Mark Zuckerberg promised to give away 99% of his Facebook stock, but his charity has given out only a small share so far.
• The article argues that tax rules let rich donors put money into charity vehicles, take big deductions, and delay giving for years.
• It says these rules can let billionaires keep control of their wealth, build influence, and receive public subsidies even when little money reaches charities right away.