The Wealth of Nations by Part 1 Chapter 8 Page 28

evident that they are not regulated by what is necessary for this expense; but by the quantity and supposed value of the work. A labourer, it may be said indeed, ought to save part of his summer wages in order to defray his winter expense; and that through the whole year they do not exceed what is necessary to maintain his family through the whole year. A slave, however, or one absolutely dependent on us for immediate subsistence, would not be treated in this manner.

His daily subsistence would be proportioned to his daily necessities.

Secondly, the wages of labour do not in Great Britain fluctuate with the price of provisions. These vary everywhere from year to year, frequently from month to month. But in many places the money price of labour remains uniformly the same sometimes for