Quantity, Quality, Use-Value

Locke's distinction between Primary Quality and Secondary Quality is actually a distinction of Quantity and Quality.  Thus, the Utilitarian quantification of Pleasure and Pain violates that distinction, which Mill implicitly recognizes in his recourse to a 'higher' vs. 'lower' distinction.  But, that correction abstracts Quality from subjective conditions, and, in particular, from subjective pre-conditions.  For, what the example of lukewarm water feeling 'hot' to a cold hand shows is that Quality is relative to pre-conditions.  Likewise, Use-Value is a function of the pre-condition of the user, e. g. a piece of bread has much greater Use-Value to a hungry person than to one who is well-fed.  In other words, Use-Value is a Quality, and irreducible to a Quantity.  It is thus inadequately represented in a Quantified Economics, e. g. as a factor in Profit.