I can see natural situations where scope insensitivity seems to be the right place to be:
Assuming we are ignorant about the absolute value of saving 4500 lives.
Assuming all potentially affected people contribute on average with the scope insensitive (constant) value. Then, the contribution per saved live would become a constant, like for 45 saved of 200 we have 200 contributions to save 45 lives and for 45,000 saved of 200,000 we have 200,000 contributions to save 45,000. That seems to make perfectly sense.
Assuming that the number of people who get to know about a problem is proportional to the problem size. Hence the number of people who can (and will on average) contribute to its solution is proportional to the problem size. Hence each single contribution should not be proportionate to its size. That is not at all a bad (implicit) assumption to have, IMHO.
It even seems to me that any personal contribution must be intrinsically scope insensitive w.r.t. the denominator (the out of how many birds/humans/...), because any single person can’t possibly pay alone for a solution of a problem that affects a billion humans.
I can see natural situations where scope insensitivity seems to be the right place to be:
Assuming we are ignorant about the absolute value of saving 4500 lives.
Assuming all potentially affected people contribute on average with the scope insensitive (constant) value. Then, the contribution per saved live would become a constant, like for 45 saved of 200 we have 200 contributions to save 45 lives and for 45,000 saved of 200,000 we have 200,000 contributions to save 45,000. That seems to make perfectly sense.
Assuming that the number of people who get to know about a problem is proportional to the problem size. Hence the number of people who can (and will on average) contribute to its solution is proportional to the problem size. Hence each single contribution should not be proportionate to its size. That is not at all a bad (implicit) assumption to have, IMHO.
It even seems to me that any personal contribution must be intrinsically scope insensitive w.r.t. the denominator (the out of how many birds/humans/...), because any single person can’t possibly pay alone for a solution of a problem that affects a billion humans.