I think there are boring practical and economic reasons against it. Screw those: this is such a wonderfully creepy idea that it should be made to work, if only in some corner of the setting. Obviously "dead" synthmorphs can be repaired and re-used. Pods might also work: they are probably built using standardized tissues, making it fairly easy to transplant parts from one to another a la Frankenstein (they are already nearly there). So at least living pod parts might be worth collecting and bringing to the Doctor. Hmm... a fresh morph that just died because it lost its head should be entirely repairable in a healing vat. New, empty brain to fill with a paying ego. Cryonically frozen bodies might be "empty" (if we assume the suspension technology was not up to scratch and scrambled their brains, or the brains were already mush due to late suspension) - thaw them using modern nanoprotocols and use a healing vat to repair them to full function. Of course, some less nice scavengers might think that the original egos are less worth than new egos (at least they are unlikely to pay better). Natural death is much trickier. The Fall evacuee who dies when his escape pod ruptures first dies from asphyxiation and lung bleeding. Then he is freeze-dried: quickly, but probably not so quickly that no decay happens in the core of the body. And then he is subjected to years of cosmic rays, corresponding to a fairly intense dose of radiation. Not too many viable cells. Still, with nanotech you might replace a lot of that (especially if you use vat-grown replacement pieces, essentially turning them into pods). I would argue that the more extreme cases of "resurrection" are little more than making a morph using the corpse as a mold. But that might still have uses: it has a unique identity, and might even claim to be a continuation of a past self (good for accessing bank accounts). I wonder if there are nanosystems that could be used to make a biologically dead body move? I doubt it would function very well: protein synthesis has stopped, tissues are dissolving, there must be an ATP source to drive muscle activity. But I can totally see somebody making a "zombie medichine" that keeps dead tissue running simply by feeding it energy, but it will not last long before the cells break up. You could inject it into newly dead people to keep them running for a few minutes (perhaps to do a post-mortem interview with somebody lacking stack), or with some nanites growing artificial nerves linked to an AI make a shambling "zombie" for similar short duration use. If you want it around longer you need to replace more and more of the body with nanosystems, ending up with an image in a mold again.