Quoting President Obama:

If you were successful, somebody along the line gave you some help.  There was a great teacher somewhere in your life.  Somebody helped to create this unbelievable American system that we have that allowed you to thrive.  Somebody invested in roads and bridges.  If you’ve got a business -- you didn’t build that.  Somebody else made that happen.  The Internet didn’t get invented on its own.  Government research created the Internet so that all the companies could make money off the Internet.

See also "Elizabeth Warren." Via Obama to Americans: You don't deserve what you've earned | The Daily Caller.

UPDATE: An unexpectedly apropos podcast I'm listening to, via http://www.econtalk.org/archives/2012/05/schmidtz_on_raw.html:

Schmidtz: Maybe in your imagination all kinds of people helped me. Tell me at what point other people helping me made me your property. Because if there was no point at which I became your property, then excuse me, but I'm going to go home, and I'm going to take all of my toys with me. If you want some of my toys, if you want me to share my toys, treat me like an adult, treat me like a self-owner, and make me an offer. And you might make me an offer that I'm perfectly willing to accept. I might say--and this was the thing you were excluding--yeah, I want to be part of a community, I want a community that has a real infrastructure; in fact, I want to be part of a community where the roads are free. Not that I think that anything is really free; I realize that I as a taxpayer will be paying for the free roads. But the point is, I want to minimize transactions costs because I want it to be as cheap as possible for my customers to get to my store. And so I would rather pay for that in part of my taxes than have to put up a toll road and have my customers have to pay to get to me. So, yeah, I want public goods, even things that aren't inherently public.

Russ: Many goods aren't public goods that are provided.

Schmidtz: Yeah. So, I'm willing to pay for it; I regard my paying my share for it as a way of respecting me as a separate person; I'm in.