I don't think any country has "unfettered capitalism" any more than any country has "pure" socialism, whatever that might be. The Nordic countries all claim to have free markets, and largely they do. Even Cuba has a smattering of privately owned stores.
Greed is a human condition, it's not new, it isn't worse now than in 1800. It can be negative or positive, I didn't work because I enjoyed the work, I worked because of my greed.