As for the labor theory of value--that's what I have been trying to get John Gulick to explain to me-- it's intuitively plausible on two grounds, as I said at the outset: first, "consumers" do judge the value of commodities in relative terms and on the basis of estimated labor time (yes this handwover sweater has greater value than a machine produced one, and the reason is basically the greater time that went into making it or yes I'll pay more for this fine meal because the foods were marinated overnight and fresh vegetables were cut--in other words, abstract labor time is hardly only a theoretical concept; indeed it has more practical application and less metaphysical status than "utility"), and second, producers are compelled to reduce prices in line with rates of labor productivity growth so that prices will tend to track labor values.
However, producers also want a fair return on their capital and that is not compatible with prices being proportional to values.
All these forces could be in contradiction to each other. Societies are probably composed of contradictory tendencies. Public debate requires the articulation of contradictory arguments so that they can be assessed openly. One should be wary of dismissing uncomfortable arguments on the basis of badly reasoned and empirically thin replies.
LR