read again
in Germany there is a lot of supermarket competition, hence they can't rip us off so easily.
also, we are just very efficient - the staff as well as the customers and even the product design.
For example, in German discounters bar codes are printed on every side of the product so it doesn't matter what side faces down when scanning it.
Also we are afraid of not having our things packed up as soon as the cashiers finishes scanning and asks for payment.
Meanwhile in France, people take 5 minutes to pack up their things before paying and while not particularly common anymore (god bless), paying with a check is also a practice here and it wastes another few minutes of everyones time.