The constant open loop on everything you own, terrified to discard anything even if its broken because there are components that might be useful to fix something else; the constant churn of second-hand (and cheap/disposable) things that are already close to death before they come into your possession and- crucially: the crushing weight of knowing that any financial roadbump is existential.
As the author mentions, a £50 fine might as well be £50,000- its unpayable, and leads to a sort of doom-spiral of lending to avoid worse consequences. Easily you can end up in unmanageable debt, in rare cases prison, its not uncommon to have the few worthwhile items you own being seized by bailifs to recoup debts, treasured heirlooms that cannot be replaced and have little monetary value so they do no impact to your debt. The hoarding of canned goods to avoid being unable to eat.
It’s hard to convey this, and what it does to your mentality- I am now built mentally to think quite fiscally conservative and do not take debts or put savings into investments like my peers. I am well off but a fraction of what I could have been had I not has this mentality.
You have to live it to understand it, but I wouldn’t wish it on anyone, its a tarpit and getting out of it without someone handing you a branch (and if you no longer have the strength to pull yourself out) then you’ll be stuck in it forever.