How would you have fixed the situation? Is there anything your father could have been taught to avoid being scammed? Does he realize he was scammed?

OP has a family member who literally doesn't seem like they can learn at all.

Scamming sucks and even people who know better can fall victim. It's best if you can go after the scammer or limit your losses. But you have to balance individual responsibility in there somewhere. Yes, a functional government does its best to stop criminals, but if someone cannot learn from their mistakes, how does society fix that? Can there be a fix that?