For starters I’d be pointing out to her that GENUINELY Classy/posh people treat EVERYONE with the same level of respect regardless of who they are.
I have friends from all walks of life including one v “posh” guy who is from a very well to do noble family - he wouldn’t dream of treating people badly or rudely purely because they worked in a fast food place or similar.
Hell I am no royalist but publicly at least the queen and the majority of royals (with some known exceptions) also treat everyone they meet respectfully to the best of my knowledge.
That’s not knowledge just from the media either, certain jobs I’ve had have meant I’ve met a few as has my dad and my ex and We’ve witnessed them putting people at ease, listening politely etc
Certain ones are known to be arses but that’s nothing to do with class but how they are personally.
You’re also slightly guilty of this yourself - I’ve known several posh people who’ve at points needed to claim benefits.
But you’re right she’s being a dick! I’d be giving her a look every time she did it and where necessary apologising for her rudeness!
Because THAT is what she is being - rude and insulting!
I’ve also a relative who with his “new” friends (“new” in quote marks as I’m meaning those he’s made as an adult and he’s in his 60’s now!) has completely rewritten his history. He grew up very poor in a very well known as “rough” part of glasgow, even outside of Scotland it has this reputation, as an adult managed - through more luck than anything - to get a very good job and marry someone “posh” and now lives and raised his children in a very posh place just outside of glasgow. He is FURIOUS with anyone who corrects him when he is blatantly denying his true background and especially when he’s being an arse to those he now considers “beneath him”. There’s been some...interesting incidents when he’s bumped into eg people he went to school with who are surprised and comment on his ridiculous fake posh accent/mannerisms - I’m sure you can guess the type of reaction! He once fell out with a close family member for months because they dared to mention where he grew up in front of a colleague of his (who couldn’t have cared less!) pathetic!!
I take very little to do with him now it’s not worth the hassle to be honest. The irony being at points they have wanted to “show me off” as I was the first in the family to go to uni and was lucky enough to go to one that has a good reputation. Made me extremely uncomfortable! That’s no longer a problem though as now they’re ashamed of me and make that clear - why? Because I’m unemployed due to serious mental illness and on benefits! Things he has made very clear to me when I've attended events of his where certain "posh" friends and workplaces were attending that he didn't want me to mention to the point of expecting me to lie eg when asked "so what do you do?" - job wise Dick!
Most of the people who work in fast-food restaurants and lots of retailers are students. They can be students in anything so she better be careful being obnoxious to them as if she's memorable she doesn't know where she will meet them next.... very true
When I was at uni I knew quite a few fellow students who worked in Maccys/kfc/walkabout pubs etc who are now lawyers, drs, architects etc