>The main issue as I see it is that as we use money as a proxy for value, we disproportionately weight the desires of the rich over those of the poor. A service for rich people (e.g. an online photo sharing website) doesn't need to produce much utility to be worth a lot of money, whereas a service for poor people (e.g. clean water for poor villages) can produce a lot of utility and still be worth little money.
That is the essence of free markets. If you look up the "welfare theorem's" you will see that the free market promises to do precisely what you describe: maximize the weighted sum of individual utilities, where the wealthier individuals generally have higher weights.
Ultimately, it is in human nature to care more about oneself and one's family (and possibly other people who you consider to be part of your in-group) than others. The free market just happens to make this fact very stark. Each time I buy a coffee for myself instead of donating to a poor village, I cannot avoid the conclusion that I care more about my momentary happiness than whether someone in that village gets some avoidable disease.
That is the essence of free markets. If you look up the "welfare theorem's" you will see that the free market promises to do precisely what you describe: maximize the weighted sum of individual utilities, where the wealthier individuals generally have higher weights.
Ultimately, it is in human nature to care more about oneself and one's family (and possibly other people who you consider to be part of your in-group) than others. The free market just happens to make this fact very stark. Each time I buy a coffee for myself instead of donating to a poor village, I cannot avoid the conclusion that I care more about my momentary happiness than whether someone in that village gets some avoidable disease.