Is a voluntary exchange between two persons. Do you see something wrong in it?
0 - it's not between two persons (but many)
1 - it creates aberrations such as genocide, slavery, social segregation, environmental pollution, wars and so on
2 - because of reason 0, for many is not voluntary, but forced.
It's a nice fairy tale, and it creates the illusion of freedom. It's actually one of the greatest tyrannies.