Does nobody know that all the grandparents were in their ninties?

Sure - but if Joe's got enough energy to fuck around in a chocolate factory with his grandson, then he's got enough energy to work part-time to help his desperately poor family

Have you ever actually met someone that old? Mustering up a whole day’s worth of energy can take them out for the rest of the month.

Yeah, I have - and the ones that could walk were constantly having to sit down, not doing bloody jigs like Joe did upon learning about the Golden Ticket.

Grandpa Joe has significantly more energy than his peers, that much I can tell - and the fact he let his poor family suffer rather than put that energy to use working even just a day a week is part of why I hate Grandpa Joe

My grandma could have mustered a single jig and one day of walking in her 90s. She definitely would not have been able to work a part time job. I think you just want an excuse to hate grandpa Joe, so you invent one even though on proper scrutiny it doesn’t hold up to reality. But you don’t need to justify hating someone, you’re allowed to just hate them for no good reason. Instead of throwing all old people under the bus for Joe’s sake, just let the hate flow through you.

I have already prefaced in another reply that this Grandpa Joe hate isn't that serious, it's poking fun at the fact he goes from bed-bound to suddenly facing and jiving as though it were nothing...

Having said that, even if he couldn't work part time, if he isn't at least as bed-bound as the others he could at least help out around the house so Mum can go work so they don't have to eat cabbage soup every night, rather than dedicating her life to caring for a bed's worth of old people.