Steinbeck paints an incredibly simplistic portrait of greed in The Pearl. It is always evil, it always corrupts, and it brings nothing but suffering. All competition in this novel is unhealthy, and everyone is motivated by self-interest, not concern for others.
Every character in The Pearl demonstrates some sort of greed; it is presented as an unavoidable, universal human characteristic.
Because Kino’s desires are for the benefit of his family, not for personal gain, he does not show any greed in The Pearl.