I'm not sure we disagree about nutrition, M0nica.
Not all nutritionus foods are expensive.
When it's been argued that carrots, cabbage and onions are relatively cheap, the excuse is given that people can't cook them because they can't afford the cooking power or don't have anything to cook with. If this is true it's disastrous as well as being diffcult to understand. My paternal grandparents were both from large, poor families but they had cooking facilities.
How did Irish peasants whose staple was potatoes (high carb but jolly good food for all that) manage? They presumably cooked the potatoes they ate.
Throughout the world, people's staples are high carb foods but that hasn't made people fat until recently.
Etc, etc. On average, people have never been so well off in this country so what the hell is going on?
Are we repeating the "great depression" of the 1920's?
You also forgot to mention the child tax allowance.