Terry Pratchett said it pretty well https://www.goodreads.com/quotes/72745-the-reason-that-the-rich-were-so-rich-vimes-reasoned

Worse than the direct cost is opportunity cost. Wealthy have money to invest and over time it snowballs. An eventful day in the market can swing their net worth more than the average person will earn in a year or maybe even a lifetime.

Think about what that means for an economy too. It means tons of folks are trapped in poverty cycles instead of innovating, starting businesses, or going to school and getting training etc. Because these things are all risky and require investment, which they can’t do.

“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 the Captain Samuel Vimes ‘Boots’ theory of socioeconomic unfairness.”

- Terry Pratchett, Men at Arms: The Play