You're comparing apples and oranges. A better comparison would be between capitalism and socialism (economic models), or communism and republicanism (government models).
Socialism is a wonderful concept. Everyone works together for the common good. All goods and services are owned by the people as a whole, there is no such thing as private property. The problem is, for this system to work, people can't be selfish, greedy, or dishonest. People are selfish, greedy, and dishonest, so a government has to be placed in charge of the goods and services, and their distribution. The government finds itself in charge of just about everything, and the power corrupts them. A communist government outlaws private property and suspends individual liberty in the name of taking care of the people. But the people always suffer.
Our founding fathers designed this republic to operate on free-market capitalist principles. When people get involved, they buy and sell, they start businesses, they work to make a better life for themselves. A successful company benefits the the customer with goods and services, and benefits the employees with payroll. We are free to buy what we want from who we want. The entire system is based on freedom. People are not perfect, but when everybody participates, it provides the most benefit for the most people. Capitalism is the best system we have in an imperfect world.