Buying power of the supermarkets just means they've cut the prices the farmers are getting or they're importing the stuff from somewhere cheaper. It shouldn't be cheaper to add packaging or ship stuff around the world but there you go. Thankfully, we have spare coin so can be more picky with where we shop - the local greengrocer still has plastic punnets of berries though so even they aren't immune.
Buying power of the supermarkets just means they've cut the prices the farmers are getting or they're importing the stuff from somewhere cheaper. It shouldn't be cheaper to add packaging or ship stuff around the world but there you go. Thankfully, we have spare coin so can be more picky with where we shop - the local greengrocer still has plastic punnets of berries though so even they aren't immune.