This problem has got a lot worse since Hugh Fearnley-Whittingstall got on his ugly veg bandwagon, they've turned to multipacks as a means of preventing people from cherry-picking the pretty stuff. As you point out, it's a PITA for people who live alone and already have difficulty buying food in the quantities they need.
Anyone who thinks we can solve the food waste problem by eating it, as HFW appears to with his smoothies made from over-ripe fruit, and donations to charity, hasn't given much thought to the problem, or done even the most basic arithmetic.
In the UK we waste 25% of total food production, a quarter of it, so if we have 66m people eating three quarters of the food supply, then clearly we would need another 22m starving people to consume the rest. That would have Nigel Farage and his merry men reaching for the smelling salts.
Alternatively, we could have the existing population eat it, how would that work out? Well, assuming a typical diet of around 2400kcal/day for the sake of round numbers, it would entail everyone eating an additional 800kcal/day. Is that a lot? Well, the calorific value of bodyfat is 7800kcal/kg, so eating an excess of 800kcal every day would cause people to gain weight at about 100g/day, or 700g/week, or 37kg a year. So everybody in the country would put on 2800kg over a typical lifespan,
nearly three tonnes! Even if we attempted to eat just 10% of the waste, everyone would end up a quarter of a tonne overweight. I won't bother calculating what would happen if just the poor and homeless were expected to eat it all by themselves.
What about burning all that fat off? Fine if you can get the entire population to do 2-3 hours of exercise every day of their lives. Good luck with that one.
Biofuel is another one I've heard, what about that? Well, yes you can make biofuel from waste food, and they already do a little, but that's made from food that's already been wasted, ie: the owner has already written it off, and incurred the loss. The mean cost per unit of energy of food fit for human consumption is
nine times that of biofuel, so as a business model, you're not going to get very far if your raw material costs nine times as much as your finished product. Another non-starter.
So if we can't actually use the excess food in any meaningful way, all that's left is to stop the overproduction.
The economic growth that makes society richer derives from using automation and machinery to produce more goods using the same amount of manpower, but the problem is that food is a unique sector of the economy in that people can't eat more just because the industry produces more, as I've illustrated above. This means that as agricultural productivity increases, the consumption remains relatively constant, and the workforce has to shrink. Over the last 500 years, the agricultural workforce has gone from 58% of the population to 1%:
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This means that as long as productivity continues to improve there will always be a surplus of food and agricultural labour that's driving prices down to rock bottom, and forcing people out of business.
That's not the fault of the supermarkets.
'They should pay the farmers more' people cry, but what then? By the time the supermarket buyers have placed orders for all the food they need, there will be some farmers left with no customer. What are they going to do, throw in the towel and give up, or ring the buyer and try to win an order by offering a discount? And if they win the business, what will the farmers who just lost it do if not offer a bigger discount to try to win it back again? Eventually the prices ratchet back down to where they were in the first place, with people going out of business, whilst in the mean time the higher prices will have been increasing supply and reducing demand, thus exacerbating the surplus. The farmer's enemy is not the supermarket, it's the other farmers that he's competing with.
If people stop buying food they can't eat, supermarkets will stop buying food they can't sell, and then in due course supply will match demand after about 25% of the farmers have gone out of business. People like the parsnip farmer on HFW's program weeping as their business goes to the wall is not a good look though, it doesn't make good PR, and it's not likely to win many votes either, so instead of making themselves pariahs by telling people this, the supermarkets just humour HFW with his policies that don't address the problem.
So in short, yes they are. Not in terms of helping those in need, but it's
definitely just a stunt in terms of solving the food waste problem.