Our local lidl stores, for some reason people like to open products up. I would assume they can't just look at the photo on the box, as a result parts are missing and the product is no longer able to be sold.
I am not sure how much this is costing lidl as company but these are not low cost products either.
Granted people do seem to open up foot pump packaging and remove the needles, again making a product not saleable or at least not at full price.