How can the purpose of capitalism be these two things at once?

[Zak the Dog]

The purpose of Capitalism is none of that nonsense you mentioned. Capitalism (a simple definition) is individual freedom without coercion from government. No, not to the level of anarchy.

Let me present to you the most anti-Capitalist program ever created.
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In 1936, the federal government published an informational pamphlet on Social Security. It stated:

"…and finally, beginning in 1949, 12 years from now, you and your employer will each pay 3 cents on each dollar you earn, up to $3,000 a year. That is the most you will ever pay."

http://www.ssa.gov/history/ssn/ssb36.html
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In order to correct all those evils of Capitalism, all the government had to do was tell a multi-trillion dollar lie. Enron executives are jealous.
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And by the way. A $2.7 trillion dollar government is NOT Capitalism. So people who complain about capitalism today are complaining about something that no longer exist.