David Ricardo,
Letters of David Ricardo to Thomas Robert Malthus…
“ When you say that my great mistake is in considering commodities made up of labour alone and not of labour and profits, I think the error is yours, not mine, for that is precisely what you do; you measure commodities by labour alone, which have both labour and profits in them. You surely will not say that my money, produced by labour and capital, and by which I propose to measure other things, omits profits. Yours does; what profits are there in shrimps or in gold picked up by daily labour, on account of the labourer, on the sea-shore? ”
