If I was one of the 700 people that worked at the vanguard what could potentially be the most profitable, culture-changing technology in the past 50 years, I wouldn't want to miss out on becoming a billionaire by working for a non-profit. My conspiracy for the day: an unspoken profit motive. And it seems to be playing out, Sam just went to MS, and if those 500 also go there, then I think that's the motivation.