Anthony Trollope said this quote

Idle Jeffrey, when asking his cousin for money: I fear I have not a mercenary tendency. The Chancellor of the Exchequer and his cousin, Plantagenet Palliser: Men must have mercenary tendencies or they would not have bred. The man who plows, so he may live, does so because, luckily, he has mercenary tendencies.Jeffrey: Just so, but you see I am less lucky than the plowman.Palliser: There is no vulgar error so vulgar, that is to say common or erroneous, as that by which men have been taught to say that mercenary tendencies are bad. The desire for wealth is the source of all progress. Civilization comes from what men call greed. Let your mercenary tendencies be combines with honesty, and they cannot take you astray.