I think it's interesting to think about it in terms of a shift of the theory of value from subjective to objective: considering things like education in terms o

I think it's interesting to think about it in terms of a shift of the theory of value from subjective to objective: considering things like education in terms of objective value, you can just total up their cost in hours of people's lives, rather than trying to consider them purchased on a market. Or, if you prefer, fixing the basis for pricing on the effort involved rather than the exchange value.