I just found a flaw in the system.
If two people are about to die and when in the after life they're both there. So if that one person gives 10 more seconds to live for his partner, then he would move on and his partner would die later. While this person spends his extra 10 seconds then dies, he can then give 10 seconds to his partner. Then if they keep on alternating this sequence, they would both live forever in the afterlife and on Earth at the same time!
Thank you!