Is Carrefour still a workers co-op? I remember reading that at some the chain was about to go bankrupt and the workers moved to take over operations.
If so, this is an excellent opportunity to set an example of just how much power a worker controlled operation call wield to enact change in societies.
Afaik, Carrefour is absolutely not a workers coop, quite the opposite. As while I do agree with this measure, I tend to see it in a much more cynical light, pretty much trying to shift the pressure onto producers, when they have been at the forefront of aggressive price negotiations with farmers, and pretty terrible treatment of their employees.
While I agree this is a good practice and would love to see it more, Carrefour is not a role model. They reportedly shrinkflatted quite heavily on their own brands in recent history. So it's a bit cynical from them..