I agree that other organisations have lots of information on us via our using store cards, credit cards etc. Don't you find that extremely concerning? I think the point the author is trying to make though is that Tesco, alone, has huge amounts of info on huge numbers of us.
I haven't finished the book yet but here's a bit about Tesco's club card: "Tesco shoppers use the Clubcard in eight out of every ten trips to Tesco. There are around 25 million in existence,representing 14 million households. Perhaps 10 million cards are in active use. Shortly before its fall the German Democratic Republic (East Germany), one of the most famous police states in the world, only ...
I got given this for Christmas. Excellent stuff. Recommend it to all whether for or against supermarkets/Tesco's. Title: Tescopoly Author: Andrew Simms Price:£7.99 ISBN: 978-1-84529-511-0