You're also assuming a specific sense of justice - you're assuming that the utility of money is linear. (That is, giving up $10 is the same to someone earning m

You're also assuming a specific sense of justice - you're assuming that the utility of money is linear. (That is, giving up $10 is the same to someone earning minimum wage and to someone earning $150k). You can hold that view - but recognize that it is a specific view, not an essential definition of fairness.