NotSpaghetti
Casdon I don't think it's choice that makes people buy cheap mass-produced chicken or the cheap imported onions (I saw these in the supermarket last week).
I think it's mainly price. It's been going on so long that many families no longer like "wild" smoked salmon for example- having bought the blander farmed variety which is so much cheaper, many don't even buy a free range chicken anymore as they buy "chicken breasts" which are also blander. I think we are getting used to cheap (and bland) and that becomes normal.
The supermarket drives down prices paid to farmers and people respond by buying the cheaper items. Then they get accustomed to the cheap item and that becomes the "norm"
This is just my view. I've not read any studies on it.
But I think it’s likely that your view is correct NS.
Except that in the very poor area where I worked for many years, I think it was highly unlikely any of the parents of children in my school bought salmon, wild, farmed, or even tinned. Pizza and oven chips was the more likely dinner for many of my pupils, or McDonalds, or fish fingers and oven chips. If they were lucky they might have got a roast dinner on Sunday (but I’d guess it would not have been a free range chicken!)