These broad brush methods are just too clumsy for the purpose they have in mind and I think they are counter productive.
When people see, after years of being told how good porridge oats are for your health, that they are now classified as junk food, they just shrug their shoulders and treat all advice about to eat with the contempt it deserves.
How about using a carrot (so healthy) rather than a stick to beat people who do not conform to food instructions.
Find a modern replacement for Delia Smith to do programmes on television teaching the basics and show how eating well(healthily) needn't be expensive, not all strawberries in winter, avocadoes and Kiwi fruit, but brassicas, root veg, rhubarb and apples. Have interludes in tv programmes when guest chefs introduce different healthy products and show how easy they are to prepare and how attractive they are.
Make eating healthily fun, enjoyable and affordable.
By chance today, we had just the sort of food i have in mind for healthy inexpensive eating. We had mackerel fillets for lunch, one each, with potatoes(crushed with some Dijon mustard and oil folded in, and cabbage. Tonight we had carrot and coriander soup with a bread roll and easy peeler oranges. We did have fresh raspberries, for 'afters' at lunch time, but nobody is perfect