Pot calling the kettle black? And I'm not so sure commenting on HN is the rooftops.
What you identify as greed and selfishness, I identify as prudence. Not knowing what tomorrow will bring and acting like it would not only improve my life, but those around me as well. I can make life for family and friends better by preparing for the worst.
> Some people work for the government to make the world a better place...
Some believe they are making the world a better place even at Facebook, but "the road to hell is paved with good intentions". Group-think that occurs in any large organization is dangerous, and that's why we shouldn't assign hard problems and our security to groups susceptible to group-think. Look out for yourself or your group, because ultimately everyone else is.