Based on the excerpt from this Discworld book, what other items do you use regularly that would fit in this theory? (Boots and shoes are fair game!)
Text transcript for people who want it:
[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.
This was Captain Samuel Vimes 'Boots' theory of socioeconomic unfairness.]
Bonus: suggest ways you can repair/restore your item/other people's items.
Food.
If you don't have much money then it can be a lot harder to eat healthily, due to cost of fresh ingredients and time to cook, which is time you may not have.
This can lead to eating a lot of unhealthy and processed food, which then causes knock-on costs later with poor health, illness, and medical bills that aomeone with the money to eat healthily might have been able to avoid.
I think the "time to cook" is the kicker here. Healthy food is really much cheaper, but you have to buy ingredients to cook with, not ready-to-eat or close to.
Things like dried lentils, beans, rice, etc are way cheaper than even inexpensive canned. In-season produce or frozen counterparts, too.
I think so many people underestimate the value of time.