In Fitzgerald's The Great Gatsby, why is Daisy a static character?

A static character is one who shows no change or growth over the course of a story.  And this is utterly true of Daisy, whom we find to be a wealthy, irresponsible, and careless girl at the beginning of the story.  She is a material girl who chooses a mate of her own kind, Tom Buchanan.  She has no interest in any important matters in the world, going through her life drinking, dancing, and partying. Her response to learning she has given birth to a girl is to say, "'And I hope she'll be a fool - that's the best thing a girl can be in this world, a beautiful little fool'" (Fitzgerald 21). We see no change in her from the moment we are introduced to her through the entire story, to its very end.  She remains careless and irresponsible, and chooses once again, over Gatsby, Tom Buchanan, who is really her male counterpart. Even her running down Myrtle Wilson, a tragedy, and allowing someone else to take the blame does not change her in any way at all.  We leave Daisy as we found her, a static character.