An example the author gives of this is car problems: people with low incomes often have older cars that are more likely to have issues. If their car breaks down, there's a chance they can't afford repairs, which means they're unable to commute to work. Perhaps because of this, they choose to stop making water bill payments or buying as much food while saving for repairs. Everything is very precarious—you're essentially one or two unlucky incidents away from ruin. That, to me, is what it means to "be poor" in the US.
https://www.residentcontrarian.com/p/on-the-experience-of-be...