Why They Left

James Whittaker, Why I left Google:
As it turned out, sharing was not broken. Sharing was working fine and dandy, Google just wasn't part of it. People were sharing all around us and seemed quite happy. A user exodus from Facebook never materialized. I couldn't even get my own teenage daughter to look at Google+ twice, "social isn't a product," she told me after I gave her a demo, "social is people and the people are on Facebook." Google was the rich kid who, after having discovered he wasn't invited to the party, built his own party in retaliation. The fact that no one came to Google's party became the elephant in the room.
Greg Smith, Why I Am Leaving Goldman Sachs:
To put the problem in the simplest terms, the interests of the client continue to be sidelined in the way the firm operates and thinks about making money. Goldman Sachs is one of the world’s largest and most important investment banks and it is too integral to global finance to continue to act this way. The firm has veered so far from the place I joined right out of college that I can no longer in good conscience say that I identify with what it stands for.