I dont think this is very true. How do you explain that 99.99% of people are super happy living their lives with just enough money to have somewhere to live and pay for food and some vehicle?

To me it seems that we have like 0.0001% of the population being super greedy and mentally ill, and they are the ones being talked about in the media and the ones turning Earth into a shitty place because of their enormous greed and lust for power.

I doubt we can remove the neurological component, let alone without it fucking up. Greed is an abstraction of our old survival instincts since as a general rule the tribe, clan, village or whatever would counter the worst effects. The end goal should be to reimplement those social control mechanisms, what that looks like is probably regulation's and maybe beating some folks over the head with a 2x4.

In other words, lets please add wealth caps world wide. If nobody can get richer than, say, 10 million dollars, then things change quickly, and its a relatively simple change to implement