Silicon Valley billionaires have a problem: They get richer no matter how much money they give away

Uncovering and explaining how our digital world is changing - and changing us. Silicon Valley billionaires keep getting richer, whether they want to or not. In an age of unprecedented generosity - the amount that Americans give to charity has increased almost every year for the last four decades - the very wealthiest tech titans continue to see their net worths increase every year.