I certainly got that a lot as a child from my parents. I remember aged about 11 asking my mother if I could go to university, and she said 'Don't be silly, that's only for rich people.' We only lived about a mile and a half from the local university (which has very beautiful grounds and is full of dog walkers and people taking a short cut, and retirees taking evening classes and people going to free concerts), and often drove past it on the way to my grandmother's in my childhood, but my parents said you 'weren't allowed to go in there unless you were a student'. They were mortified when I did well enough to win a scholarship to university because it was in the papers and people would 'think we were getting above ourselves'. T
If asked, I would describe myself as 'educated working class' (though that's problematic in itself, I get). I'm the child of a very poor binman and a cleaner who both left school at 13, and I found in education a way out of poverty. Despite having several degrees, and working in a professional field, and being comfortably off, and moving easily in MC circles, my early life and expectations still determine much of my outlook.
If you've been poor enough to need to know not to ask a friend to come home after school because the food isn't there, and to grow up knowing never to ask for anything 'extra' because there's no spare cash, and if you have to help your parents fill out forms when you're eight, it has a lingering impact.
And bluntly, I have a different attitude to streetsweepers, office cleaners, binmen etc compared to people who don't have parents/PILs, aunts/uncles etc who do these roles.
On the other hand, my DS leads in many ways an MC life -- two professional parents, lots of social and cultural capital washing around the household. But he also has a big extended family who do low-paid manual jobs, so that's never not going to be 'normal' for him.