A question I asked on the stats Q/A has a comment that reads,
[...] to make 8 times the amount of food a recipe describes you don't just octuple all the ingredients mentioned (eg. salt)".
Some recipes, of course, don't scale well if you try to cook them in larger batches, but that's not what I understand the comment as saying. I understand it to say that, when scaling recipes you may need to use different multipliers for different ingredients.
I feel fairly certain that this is not the case for most recipes. I wonder though, if there any recipes where the ingredients do not scale uniformly.