From Elizabeth Warren’s 2012 Senate campaign, quoted by John Cassidy in his review of her autobiography.

There is nobody in this country who got rich on his own. Nobody. You built a factory out there? Good for you. But I want to be clear: You moved the goods to market on roads the rest of us paid for. You hired workers the rest of us paid to educate. You were safe in your factory because of police forces and fire forces the rest of us paid for. You didn’t have to worry that marauding bands would come and seize everything at your factory…. Now look, you built the factory and it turned into something terrific, or great idea? God bless. Keep a big hunk of it. But part of the underlying social contract is you take a hunk of that and pay forward for the next kid that comes along.

That clip from her campaign is on YouTube.