The comment to which I replied chaffed at thinking there could be any other system than what there currently is. To me this is a dangerously rigid way to view the human life. Everything should be questioned, if only to find answers.
Yes, historically we are doing pretty good. This proves sometimes changes in systems improve things. This is why questions that generally lead peoples to think of other systems should be approached with kind questioning and inquiry rather than scoffing them as rubbish off-hand - we should amswer why they often are impossible.
"That's a profound problem. We're limited now by artifacts of human cognition."
Yes, this is a very good summary of the other half of the problem. The other is figuring a dynamical model of the economy (which might or might not be impossible).