I think your question is a non sequitur. Man can never pay for their own sin (not even a single sin) in hell. If man pays for their own sin in Hell, God is eternally unpaid as a finite man committing an infinite crime against and infinite God can never be payment. That is why Christ who is infinite can satisfy God's wrath against sin...all sin...for all time.
We sort of got into this discussion on another thread
I agree that no man can ever pay for his own sin, because I would say that each sin is penalized with eternal consequences. Therefore as you say God's wrath is never fully satisfied and justice is an eternal payment of wrath from God to the sinner. This would mean justice is met in an eternal sentence. I think the worse the sinner is, the worse degree of hell they will have, but there are some who hold that all have the same degree of hell.
I think you raise a good point, and please critique what I just said.
I still think it is wrong for everyone to be going to hell simply because they have rejected a Savior. I think that has some truth to it, but as I said in the other thread, I think when people die in sin, they go to hell for their sins. If Christ paid for them then they arent going to hell for their sins.
I think this is definitely a tough topic to understand so dont think I have reached an ultimate destination on my logic. I do think Scripture is clear that God perfectly and precisely died for the elect and paid for their sin and I dont see why a non-Cal would deny this even in their view of foreknowledge.
I agree with the point that God's grace is sufficient for all mankind, but I dont think Jesus died just in case some would surprise Him and believe.
I also think when looking at Jesus payment it is vital to have a proper outlook on our condition:
1. We must ask ourselves if we deserve a Savior and a chance? NO
2. Is it fair for God to not save some? Yes
and so forth... I think God in some sense is willing to pay for all, but in the deepest truth only died for His elect because they are the only ones who would repent and believe. Yes I do think there is Scripture supporting both.