Corruptionists hold that our souls survive death, but we are not our souls, and we do not survive death. All the corruptionists I know are Christians, and hold that eventually there comes a resurrection of the body, and then the soul regains its body, and our existence resumes.
A standard argument against Christian corruptionism is that on the view, it is our soul after death that suffers punishment or enjoys reward, while it is unjust that something that isn’t oneself should suffer punishment for one’s deeds.
A corruptionist response that I don’t ever remember seeing is this: only persons can be subject to injustice, and the soul is not a person, so no injustice happens to the disembodied soul.
While this does solve the problem of the injustice of the punishment, it does so at a cost. For if injustice cannot happen to a non-person, then by the same token, justice cannot be done to a non-person. Now it is only appropriate to punish x if the punishment is an instance of justice. If justice cannot be done to a non-person, then punishment cannot be appropriately imposed on a non-person.
This lead to a direct new version of the argument against Christian corruptionism: only persons can be appropriately punished, disembodied souls are not persons, and hence it is not appropriate to punish a disembodied soul. This version of the argument has an advantage over the standard argument, namely that it is irrelevant whether one’s sins belong to one’s soul or not.
How plausible this dialectics is depends on how plausible is the thesis that only persons can have justice or injustice done to them. I find the thesis plausible.
Remark 1: Of course, we talk of punishing and rewarding dogs and other non-human animals. But I think that is an analogical sense of the words "punish" and "reward."
Remark 2: Although noting that the soul is not a person solves the problem of injustice, it doesn't by itself resolve the problem of the imposition of suffering. Even though it is not unjust to kick one's dog when the dog did nothing wrong, it is wicked to do so.