I like the watermark on the LES "You must report all errors to your commander!"
My best friend's dad was a bird Colonel. I remember my friend's mom telling me that if the Army overpaid you they would get it back eventually. It may take years, but they'll track it down, even if only a nickel, and deduct it from your pay.
During the Reagan years (and maybe even started late in the Carter admin) they really jacked up pay so it approached something livable. Maybe not for E1/2/3's, but at least better. It was a volunteer Army of course.