I agree.
Sure, I do my part in trying to cover for five individuals almost everyday.
Most times you can find the product. However, I agree with beamher that the shelves especially could be stocked more thoroughly. If it really bugs you, I'd suggest writing a short succinct letter to management expressing as much. Maybe they'll finally put a boot in the shady night crew. It is primarily night crew's responsibility to order and stock the shelves almost every night. What they usually do is order a bit less here and there so that there are far less pieces overall to put up that night. I continually express as much concern to management on specific items/sections, perhaps something will change when I'm working more hours in a few weeks. Inevitably I'll be leaving, thus I can only improve my performance and the performance of others for only so long.
Of course, there are popular/common everyday items that get hit on specific days (WIC and foodstamps week), I still believe this to be a cop-out though. I believe a store should have a continual healthy stock elsewhere so as the shelf/display is never empty. SFW has a decent backstock on its sale items "end cap items", which is what I work with usually. Not every single item can be backstocked though; we just don't have the room.
I may come off as speaking high and mighty but I take each and every job with a certain seriousness, even if I'm shoveling poo.