"Not even the very wealthy can continue to succeed without a broader-based prosperity. That’s because 70 percent of economic activity in America is consumer spending. If the bottom 90 percent of Americans are becoming poorer, they’re less able to spend. Without their spending, the economy can’t get out of first gear. ... Get it? It’s not a zero-sum game. Wealthy Americans would do better with smaller shares of a rapidly-growing economy than with the large shares they now possess of an economy that’s barely moving."
- Robert Reich in "The Non-Zero Sum Society"