because masters oftenhad to make up work for their excess slaves; because slaves retained in agriculture werenot available for industry or other productive labor; because slaves required greatersurveillance than free workers, rendering their upkeep more expensive; and because slavesconsumed more than free workers, not for pleasure, but through theft, waste, andcarelessness.43 The great sin of slavery was, therefore, that it undermined the productionof wealth—that personal wealth that was the essence of national wealth.
ECONOMIC arguments against slavery/serfdom appear (political economy)
Builds off of wealth of nations assertions that goal of national ecoomy is to generate maximum wealth. -> slavery undermines personal wealth, key ingredient for national wealth/development