Suppose a killer asteroid is coming and we can only save ~10% of the population.
If you do pure random assignment then having a 7 at the end of your SSN could make a difference. EX: We rolled a 10 sided die an a 7 came up. On the other hand if you want to maximizing the number of people saved other things may be considered (Age, weight, vision etc).
I am not going to say a specific system is the only correct one in that case, but rather many of the differences you suggest are meaningless could suddenly become meaningful differentiation in a moral system. Further, those differences are not necessarily inherently important outside of that specific system and situation.
If you do pure random assignment then having a 7 at the end of your SSN could make a difference. EX: We rolled a 10 sided die an a 7 came up. On the other hand if you want to maximizing the number of people saved other things may be considered (Age, weight, vision etc).
I am not going to say a specific system is the only correct one in that case, but rather many of the differences you suggest are meaningless could suddenly become meaningful differentiation in a moral system. Further, those differences are not necessarily inherently important outside of that specific system and situation.