Reversing the man's death status will hurt innocent people badly. In particular, it would force his abandoned wife and children to pay back the Social Security benefits they claimed after he disappeared.
The real problem is with the Social Security Administration rules. They should not force the woman and her children to give back the money. I suppose the ideal situation is that the man is dead as far as the SSA is concerned.
Honestly, I am totally unsympathetic with this man. He abandoned his family. He abandoned them and was dead to them. He should have just stayed dead. No driver's license? Tough shit, asshole.