[Insanity]

Carrefour is not the only shop here to have introduced it, I have seen it in Match as well (in Leuven). The smaller shops of Carrefour, the "express shops" don't have it iether, so not all stores of carrefour do, but then again they are smaller shops and there usually are not _that_ much people.

Colruyt, aldi and lidl might consider the expense of the machine + people to do the random inspection as a cost they do not want, as they do aim to keep the price as low as possible. Wether you pay people to sit at a checkout or wait to check other people, the amount of money you might end up saving might have been considered not significant.