Often in threads about supermarkets, this one being no exception, it all decends into a debate about small shops vs supermarkets and the relative price of onions.
My problem with the big supermarkets, however, isn't about how good they are or not, or whether it is nicer to go to a small shop rather than a big soul-less warehouse shop. I've got no problem with people shopping at supermarkets, and yes they can be convienient, and yes at least they are normally unionised (much to ASDA/Walmarts dislike).
But... my problem, which as I read it is the main point of the article in the OP, is the astounding amount of power that the big supermarkets wield. I find it unhealthy in society that a private, profit making company should have more wealth and power than a small country and can hold it's own against national governments, let alone local councils who don't face a chance in a planning battle when faced with the bottomless purses of a Tesco or an ASDA. And remember the big supermarkets aren't just food retailers any more, it is getting into any sector that it can think of: stationary, clothes, books, music, insurance, pharmacies, petrol garages -isn't there talk of doctors surgeries and voting booths too?
Okay, this problem is about modern global capitalist society and applies just as much to News International's power in the media world, but dismissing these problems with 'but they sell cheap garlic' overlooks a complicated problem in modern society that doesn't benefit from being discussed in a black and white, good vs bad way.