Has sjm brought a new bit of AWAD-lingo to the fore with ["faldagery"]?
Or have I just not been paying close enough attention?

I've always understood your wage is your remuneration and your wages are the pile of bills with which you are renumerated. Something about "compound" sticks in a dusty corner of my mind.
Anyway wages of sin is ...is so firmly entrenched I doubt our pronunciamentos (see today's wwftd) will have much effect.