A too great disproportion among the citizens weakens any state. Every person, if possible, ought to enjoy the fruits of his labour, in a full possession of all the necessaries, and many of the conveniencies of life. No one can doubt, but such an equality is most suitable to human nature, and diminishes much less from the happiness of the rich than it adds to that of the poor. It also augments the power of the state, and makes any extraordinary taxes or impositions be paid with more chearfulness. Where the riches are engrossed by a few, these must contribute very largely to the supplying of the public necessities. But when the riches are dispersed among multitudes, the burthen feels light on every shoulder, and the taxes make not a very sensible difference on any one’s way of living.
Add to this, that, where the riches are in few hands, these must enjoy all the power, and will readily conspire to lay the whole burthen on the poor, and oppress them still farther, to the discouragement of all industry.
—From the essay “Of Commerce“
Hume was a close friend of Adam Smith and is usually thought of as a Tory, and but I guess David Horowitz is right about the chronic left-wing bias of the academy.