The "banality of evil" was originally used to describe the bureaucrats who enabled the mass-murder of Holocaust victims (Godwin's law strikes again!). Their actual goal, the primary outcome they were trying to maximize, was murdering Jewish people and other "undesirables". I don't think this guy was trying to do anything on that level. I don't think he sat down every day and said "how do we kill more people?" Rather, he was working within a really bad system that has bad incentives and no one knows how to fix it.