This is nice.
Wasn't it in the 40's they changed the name from "Department of War" to "Department of Defense?" It's time for another switch.
"Department of Irresponsibility?"
Not specific enough.
How about the "Department of Screwing Up Really Bad, But Blaming Someone Else?"
I guess that's too clunky.
OK, I got it. The Department of Rationalization. It's a synonym for "defense," but the connotation is a bit more spot-on:
2: (psychiatry) a defense mechanism by which your true motivation is concealed by explaining your actions and feelings in a way that is not threatening
Yeah, that's the ticket.