Robert W. Wilson, a well-known philanthropist who had given away $600 million of his fortune as of 2013, abruptly turned aside Gate’s 2010 request that he sign the Giving Pledge.
The pledge pushes billionaires to give away a bulk of their fortune while they are alive, or in their will.
Wilson found especially problematic the pledge’s loophole that allowed signers to gift their wealth to a family-controlled foundation.
“And these foundations become, more often than not, bureaucracy-ridden sluggards,” Wilson wrote to Gates in a June 2010 e-mail, a copy of which was obtained by the website BuzzFeed.
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