In the UK a granny can't buy a few vegetables without being charged a surcharge for the bag that's required; though corporations package food with thousands and

In the UK a granny can't buy a few vegetables without being charged a surcharge for the bag that's required; though corporations package food with thousands and thousands of tonnes of excess packaging with seemingly no additional charge. Where's the justice in this? Why charge the consumer when huge corporations like Asda, Tesco, Lidl, Aldi, Sainsburys etc are happy to buy tonnes of plastic that's unnecessary and will be thrown away? Carrier bag charges are just posturing in the face of this.