Must say I am very proud to say that the 2 big supermarket chains here (Migros and Coop) do take their responsibilities here VERY seriously, re welfare and conditions of workers abroad, be they strawberry pickers in Spain, or workers in Bangladesh. And with regard to using on wood from sustainable forests, cutting down on palm oil and only using palm oil from sustainable and ethical sources. Same with husbandry, feeds, antibiotics, transport, slaughter, etc, etc, of meat animals. But yes, that does mean you can't buy 2 large chickens for a 5er here.
A huge amount of food is wasted in the UK because it is 'too' cheap- and not respected. 2 for 1 offers are the worst- as people can't resist them and then second chicken or 2nd bag of fruit and veg gets thrown away (rather than frozen, or cooked and kept in fridge, etc. Left overs are thrown away - hardly anybody makes stock with bones, etc. Cheap = no respect too often. Be it clothes, be it food.