For one thing I think Ethan Hawke's scientist friend Chris was probably justified in trying to suppress the "cure" for vampirism in favor of wide distribution of a blood substitute. The "cure" was going to lead to the immediate, horrific, violent deaths of hundreds of millions as wave after wave of vampires eat the preceding wave which just turned human from eating a cured human. And even worse, the survivors of that initial phase will have lost their immortality. It would be far preferable to let everyone stay immortal and survive on the blood substitute.

Yeah, Sam Neil's Pharma CEO character Charles Bromley said they're going to keep collecting a little bit of real human blood for the wealthy elite, but that's a problem to solve at a later date. The elites are going to do horrible evil stuff whether they're vampires or humans, you don't need to throw out the baby of immortality with the bathwater of elite vampirism.

(http://www.autoadmit.com/thread.php?thread_id=5901094&forum_id=2#50118918)