Neither of my parents earned anything like what Jack's parents did and we weren't poor growing up. We certainly weren't well off but we were fed, had clean clothes, the odd package holiday and my parents were homeowners. The area we lived in for most of my childhood was economically mixed but overall mainly middle class- to a small number of proper rich people so you'd occasionally feel like a bleeping peasant in comparison but like I say we were not poor by any stretch of the imagination. I'd say we started off working class and eventually scraped lower MC. It's well after I left home that my parents started making anything comparable to Jack's parents and even then I think they'd still fall a bit short.
We did have a couple of our very own The Poverty incidents when my dad was made redundant and things were briefly pretty miserable materially - no treats, everything basic, parents going mental about lights getting left on but at no point did anyone miss a meal. Granted it was a basic witch of a Kwik Save meal you got and with hindsight that time my mum tried to convince me that "loads of people" use dry own brand Weetabix instead of bread when they run out was probably a bit of brief povvo improv but no one starved. Sorry but there is no bleeping way Jack's parents skipped meals- I suspect they occasionally wanted a bit of time to sit down and eat together without looking at that whining shitshow across the table.