Capitalism has served the U.S. well, and as the other posts have pointed out, so has a fair amount of regulation and government intervention. I am in favor of a consumer-driven market, in which the products, goods, and services are driven and influenced by the consumers and business owners, rather than the government trying to dictate what people need or want.
When I taught history, I used to use the example of toilet paper to illustrate the differences between capitalism and communism: toilet paper in the U.S.? soft, white, even available with aloe, if you wanted it; toilet paper in the U.S.S.R.? pretty much non-existent for most folks. It just wasn't a priority for the government to produce it.