I think there's a lot to be said about just enjoying your work. It can be very contrived when people say their work is for the good of mankind.
In order to build a great technology company, you have to hire lots of incredibly smart people. It's a total waste to have lots of big brains but not let them work on your biggest problems.
Some libertarians say, 'Well, if people work harder, they can make more money.' But, you know, my mother is a nurse and I am a venture capitalist. I think no matter how great a nurse she is, she wouldn't earn a one-thousandth of what I can make, if that.
Most of my job and most of what I do is to mentor people. There are a lot of people I work with that I don't have investments in.
Do you have a real interest in people who work for you? Most good leaders have that - it's hard to get someone to follow you if they feel like you hate 'em.