However I do agree that its disgusting that supermarkets throw away tons of food a year that is still edible when it could be distributed to local charities or nursing homes (which could help alleviate the increasing costs to the residents) instead.
Utopia. Or should that be Eutopia these days

Anyone buying or selling product recognizes industrial tolerances of supply i.e. +/- a small %age. I've had this out with small time buyers who complain that their order of 20K widgets contained 20,050 widgets...
The problem is nothing more than a micro mentality focusing on a macro issue. They'll never be reconciled

That said, the Supermarkets will have to assess whether
freeganising their waste is cost effective in PR terms. Seeing their embracing the Organic market as they have... they just might...