In case you haen't figured it out, there is no such spell and won't be one,
because items lying on the ground are crap and aren't worth anything. It would
be in your best interest to destroy monsters and their eq instead.
Basically, I want to see active reavers, not garbagemen. If you feel the neeed
to "mass sac" you can just dump everything in a box or corpse and then
attrition the container.