Unironic ancap here. I really don't understand why anyone here listens to Marx, considering he balances his critiques on LTV being a correct analysis. Yes, Smith, Say, Ricardo, et. al. all utilized LTV, but their versions were quite different, especially regarding past labor.
The LTV was assembled ex post in order to justify his greater (fallacious) economic claims regarding economic oppression.
LTV is quite simply incorrect.
Value is wholly subjective as can be empirically verified even in the total absence of markets.
What value is a glass of salt water to the man treading water for his life after a shipwreck? None. To the man with a sore throat, however, it is potentially of no small value. Yet there is some labor involved in the acquisition of that glass of saltwater. Someone must fetch it. That's transportation, labor. Ergo, even in a glass of salt water (totally exempting the glass itself), there is some labor. Yet it has no value whatsoever to the man in the first example, and some small value perhaps to the man in the second. Yet based on the LTV, the value of that glass of water is OBJECTIVE, and based principally on the labor that went into its fetching.
Even a simple, common sense analysis utterly invalidates this theory.
If value is objective, then one needs must engage in the same kind of Herculean sophistries as did the pre-Copernicans in their attempts to rationalize and explain why planets seemed to wobble in what _ought_ (according to their theory) to have been perfect circular orbits.
If value is subjective, however, no such Herculean efforts are required, and Occam's Razor is observed.
The glass of cool, clear water is of some small value to the thirsty man busy about his day in town. He might happily pay you a small sum to be refreshed.
The glass of cool, clear water is of near infinite value to the man dying of thirst and dehydration in the desert. He might happily pay you his every last cent to be refreshed. (Mind you, this is a matter of economics, not of ethics or of social mores.) Because without life there is no choice to be made, and no valuation is possible, therefore the man hungry to live and dying of thirst is likely to value his life over his possessions or wealth.
Ergo, value is subjective.
Because value is subjective, central planning is predestined, due to the error of its premise, to never result in the keeping of its promises of equal distribution and plenty for all.