There is the notion of "socially-necessary labor" and the amount of that required to produce a thing does depend on the capital goods available to the people doing the work (that is, the technological sophistication and level of economic development). The expectation is that it will go down the higher the economic development. This can even make things that previously weren't worth doing before, worth doing now, because their value in labor is finally less than their use value.
In principle market forces are supposed to drive down prices, are they not? Absent collusion and corruption, etc., we would expect the price of a good to be very close to the cost to produce it. This is what pro-capitalist, pro-market economists keep telling us, anyway - and that is at least the theory. But that cost to produce it is exactly the capital used in the production plus the labor applied to that capital. But if capital is just the product of labor, then in fact the cost to produce the item - and thus the price I will expect to pay in a competitive market, does in fact correlate quite well with the labor that goes into production.
In principle market forces are supposed to drive down prices, are they not? Absent collusion and corruption, etc., we would expect the price of a good to be very close to the cost to produce it. This is what pro-capitalist, pro-market economists keep telling us, anyway - and that is at least the theory. But that cost to produce it is exactly the capital used in the production plus the labor applied to that capital. But if capital is just the product of labor, then in fact the cost to produce the item - and thus the price I will expect to pay in a competitive market, does in fact correlate quite well with the labor that goes into production.