Greed is not justified. I get that people are weak, selfish, they can't stop themselves. Some feel sympathy because they've been weak too. "Maybe it's justified," they like to think. "Everybody lies." But seriously, those who care so much about money and power they can't do things in a civilized respectable way: they are not yet an adult and must be hard barred from the upper tiers of capitalism until they learn that life does not revolve around them.
I blame them for being shitty, and blame everyone around them for letting it happen.