The Wealth of Nations by Part 4 Chapter 9 Page 44

is equal to the value of what they produce, they probably mean no more than that their revenue, or the fund destined for their consumption, is equal to it.

But if they had expressed themselves more accurately, and only asserted that the revenue of this class was equal to the value of what they produced, it might readily have occurred to the reader that what would naturally be saved out of this revenue must necessarily increase more or less the real wealth of the society. In order, therefore, to make out something like an argument, it was necessary that they should express themselves as they have done; and this argument, even supposing things actually were as it seems to presume them to be, turns out to be a very inconclusive one.

Fourthly, farmers and country labourers can no more