I think it's about priorities, tbh. And I see this, doing my job as a market researcher running focus groups with people upper, middle and lower class. Food is just much less important for some people - regardless of class.
We don't care about ingredients and where we come from. We're not prepared to spend more than about 20 minutes making meals, which means we rely more and more on convenience foods. And the more we do this, the less likely we are to be able to cook - therefore cooking anything takes even longer, so it's unlikely to happen.
And we would rather spend money on 'experiences' and 'saving time' so we go for the easy, microwave and/or take-away option. With only a nod to our health - buying 'lite' or 'low fat' or 'healthy options' foods, without having any real clue about what's in them to make them any healthier. In fact the reality is that many of these so-called foods aren't that healthy.
What Jamie is trying to do is inculcate an appreciation of the raw/component ingredients. I'm not sure why salmon and basil should seem so poncey to anyone here, as they have been staple ingredients in any supermarket for years now. And Sainsbury's basic salmon, responsibly sourced and an RSPCA Freedome food, is actually cheaper than buying chicken now.
How many people who are featured on programmes like this drive nice cars, have lovely flat screen TVs, expensive trainers, holidays abroad, etc, etc? It's about their priorities, and food isn't one of them.