is there an official name for the practice of adding extra complex task to a job routine, task that would take a new worker just to do them but instead everyonr has to do them while they do the rest if their jobs?

Context: I work at a coffee shop as a barista. Everyone does literally everything: coffee, cleaning, closing the store, etc. The coffeeshop takes deliveries to homes of clients if they ask for a special breakfast, and that is something one person outside of the coffeeshop managed entirely, the bosses son. Now, he no longer does it, and we have to do thar, while also doing the rest of the tasks. We are usually 3 on store and that is just a little lacking when it gets crowded, but now thanks to this we are 2 because this is not something you can manage while doing other things… Why do bosses do this shit?