Unchecked capitalism is just as bad as communism. Capitalism kept in check by proper regulations is good. That demands a well functioning democracy however, and is unfortunately quite rare.

We’re always going to have a system that optimises (aka is greedy), it’s just a practical necessity. The issue is what gets optimised. The utopian solution is not to eliminate greed but to make incentives that lets people be greedy for maximum overall happiness (ie make sure people get paid the most when everyone is happiest with the outcome and the environment is minimally affected, etc).