I've lots of clients from immigrant/ethnic families and I agree with everything you say.
But that's also the way I live my life. I have money, but am careful about what I spend it on. It comes from younger life when we had nothing, no holidays, a clapped out old car that kept breaking down, ice on our bedroom windows, etc. When your formative years are like that, you quickly understand the true value of money. When I started work, it was a full time crap job on less than £1 per hour - I had to carefully plan - made my own packed lunches because I couldn't afford sandwich shops, would plan which week of the month I could buy a new top or pair of trousers, plan car journeys around when I could afford to put fuel in it, etc. You don't lose that kind of budgetting/planning even when you don't need to keep spending down.
I'll happily have a blow out buying a brand new car every decade or so, having the occasional expensive holiday (last was a cruise for £10k), etc., but it's not the norm, and I shop around and get deals when I spend anything, whether a brand new car (usually 10-15% off list price by shopping around and haggling), cruise would have cost £20k at a different time of year, and by using a different airport, etc. I think carefully and shop around for every pound I spend. Just because I spent £10k on a cruise doesn't mean I'm not going to buy yellow sticker items if available, or that I don't rotate between supermarkets to buy multipack crisps where they're cheapest. It's amazing how much savings you can accumulate over the years just by being careful and shopping around, and you still get what you want, without actually doing without anything.