I think the issue is with lack of data. The folks stocking the kitchen notice that at the end of the day all snacks are exhausted. From that they conclude that

I think the issue is with lack of data. The folks stocking the kitchen notice that at the end of the day all snacks are exhausted. From that they conclude that everything is equally popular and there is no need to change the proportions in which each is stocked. Instead if they measured twice or thrice during the day they’d realise that some items are more popular than others and stock more of them. Often this issue is cast as the company refusing to spend more money on snacks but I don’t think it’s the money. It’s the fact that they don’t know which snacks are truly popular and which people are eating because they’re hungry and have no choice.