PSN can't do this because of 3 reasons.
1. You can't change your PSN if there was a reset like on Xbox you can claim an OG gamer tag. On PSN you have to create a whole new account.
2. inactive PSN's get pulled back by the original owners with their serial or OG email to the account, they want the owner to come back to their original PSN & not a generated one.
3. Another thing is PSN doesn't reset inactive PSN's because the owner could come back at anytime. Wanting to play on their OG account, Yah feel me?