Many contributions that people make to a functioning society can't, and never will be, quantified. One way around this is to assign a base value to a person be

Many contributions that people make to a functioning society can't, and never will be, quantified. One way around this is to assign a base value to a person because they are a member of the human race and a citizen of your country, and then let them demonstrate additional value through the usual capitalist means. It's imperfect, certainly, but it works well enough in many developed countries, and it's more accurate than the model that says what can't be measured has no value.