

On the morality point, I’d argue that we should spend the money to rescue any person if we have the money/means, and it can feasibly happen without excessive risk to other lives, otherwise we’re assigning monetary value to human lives.
Resources are finite, though. If rescuing one person requires, say, 10 units of resources, but rescuing 10 others require only 1 unit of resources, isn’t choosing to rescue the 1 over the 10 already placing relative value on human lives, by declaring them to be 10x as valuable as the others? This is obviously operating on the assumption that we don’t have the resources to rescue everyone who needs rescuing.
So, Primer, then? Where you can’t return to a point in time before the time machine was constructed?