system
Given the following post, respond as if you're commenting on Reddit:
human
[Harry Potter] If the Weasleys struggled with money to the point that it was considered characteristic of the family, why didnt Molly get a part time or seasonal job to help Arthur?

I know she chose to be a homemaker and has kids to look after, but once Ginny went to Hogwarts they were all away at school most of the year or adults who had left the nest. 
Any time we see the burrow there are pots stirring themselves and needles knitting on their own. In Fantastic Beasts we see it takes no time at all to cook a meal. It's seems magic drastically reduces the time a homemaker has to spend doing chores as they could theoretically all be taken care of with the flick of a wand once one gets home from work. 

I never thought to question any of this until a close friend of mine who is quite possibly the most brilliant person i know as well as the ultimate HP fan, brought it to my attention. Having read the books and seen the movies many times in the past, neither of us could think of a compelling reason for Molly not to get a job and help out a bit.
gpt
It's simple; the Weasleys aren't poor.  


They're lower-middle class landowners, a far cry from actual poverty. They're the magical equivalent of the Dursleys, except instead of living in some cookie-cutter suburbia with a perfectly manicured lawn they live in a ramshackle tower of a townhouse on a decent plot of land, and unlike the Dursleys they're perfectly happy and secure in their image.  


Molly doesn't work because Molly doesn't need to work, ends are met.  


All of this is from the perspective of Harry and the Wizarding world. Harry is crazy rich, Malfoy is crazy rich, even Hermione is from an upper-middle class family of two professionals, presumably with their own practise(s).  


Almost all, if not all, of the other pureblood wizarding familes we see are of Malfoy's class, so it makes sense that they'd sneer at the Weasleys and their lack of wealth, especially given how massively bigoted they are as a people. We also know from comments Malfoy makes that there a lot more Weasley kids than there are in your typical wizarding family. Having a lot of kids close in age when you're not fabulously wealthy means that hand-me-downs and recycling school materials just makes sense, especially for a down-to-earth and pragmatic family like the Weasleys.   


We really don't get much of a look at any readily identifiable working class wizards. Lupin, perhaps?   


tl;dr They aren't poor, they're just not that rich, and don't care about looking rich.