So ... I'm assuming none of these people's families wanted to bury them after they died, then?
Or, given the fact that their original clothes still should have decayed in the meantime, even if that was the case, the Plutonian went around AFTER they were buried, scooped them all up out of their graves, dressed them up in the same types of clothes that they were wearing when they died, and then posed them in the same way they looked when they died?
This is really kind of Millar-esque writing - go with an OMG SHOCKING IMAGE, but then, don't pay any mind to what that image would actually MEAN.