I think you are a wee bit out of touch. I am from a low income family and "became" a low income family with dd when I became disabled and unable to work.
I well remember my parents refusing repeated requests for ice cream from the van in the school holidays it was a rare treat if we'd been super good or it was a special occasion like a birthday. We lived in the midlands at the time and I remember a Cornetto was 50p which with inflation is worth about £2.25 now so not that far off the £3. Plus there were 3 of us kids plus them so when I think of it being at least the equivalent of £6.75 a go I'd have bloody well said no too!
And even with just dd I also mostly said no it is very much a luxury like costa (pretty crap actually) coffee.
But to the pp with choc ices offered - you were posh
we didn't even have a freezer at that point! There was a frozen shelf in the fridge which contained a rectangle of vanilla ice cream in a cardboard wrap from bejam and we made wafers - or if we were lucky - nougat ice cream using that.
I did similar with dd except by the time I had dd having a freezer was normal and supermarket Ice cream and lollies were considerably cheaper! A fact I pointed out to her as a small child, partly as a maths lesson, party a lesson in being a savvy consumer! (I was kinda militant on that score, dd is now 20 and there's still a standing joke between is I'll say "what are adverts for?" She'll reply "to make us buy rubbish (she is now allowed to say "shite/crap" barely -
) we don't need")
I taught her from an early age not to be sucked into buying unnecessary items by "special offers" and to check whether such offers are actually good value for money.
I'm also rather bored of the "the south east is the most expensive part of the Uk" which is not entirely true indeed one recent survey of house prices found there are at least 4 parts of the country which are far more expensive.
I've lived in London as a poor waitress and I still have friends there who aren't on high wages and they manage. It's all about priorities