I thought the film was very humanistic.
I've read reviews either praising or criticizing the film's "coldness" or distancing of the viewers from the characters. I actually felt the film very carefully built empathy for many if not all of the characters. I pitied or sympathized with nearly every character, especially the young boy and two teenagers. Their vulnerability was so palpable and sad.
I think the film focuses its condemnation on unrestricted capitalist society and posits greed as a disease that spreads when even our morality is up for sale. I though the film was brilliant, one of the best of 2008.