There are other ways to establish the concept of the monetary value of a life.
You have three buttons in front of you. One will save the life of a random person somewhere in the world. One will kill a random person somewhere in the world, and also add $1m to your bank account. One will kill a person you can observe, and add $1b to your bank account.
Which button do you press? You're going to think about it, that's for sure.