Reddit reviews Men at Arms: A Novel of Discworld

re: Spending money on quality being cheaper in the long run

KnowsWhosHotRightNow, Rachtacular makes an important point.
(Along with Jesse's finances being literally none of our business. . . )

Always makes me think of the "Sam Vimes 'Boots' Theory of Socioeconomic Unfairness

>The reason that the rich were so rich, Vimes reasoned, was because they managed to spend less money.

>Take boots, for example. He earned thirty-eight dollars a month plus allowances. A really good pair of leather boots cost fifty dollars. But an affordable pair of boots, which were sort of OK for a season or two and then leaked like hell when the cardboard gave out, cost about ten dollars. Those were the kind of boots Vimes always bought, and wore until the soles were so thin that he could tell where he was in Ankh-Morpork on a foggy night by the feel of the cobbles.

>But the thing was that good boots lasted for years and years. A man who could afford fifty dollars had a pair of boots that’d still be keeping his feet dry in ten years’ time, while the poor man who could only afford cheap boots would have spent a hundred dollars on boots in the same time and would still have wet feet.

It's from his novel Men at Arms.

EDIT - changed to MaxFun referral link - thanks Rachtacular!