So what happens if the restaurant simply says "No, we are too busy" to individual bills, or you are abroad and you simply cannot get the Greek/Uzbeki/Welsh waiter to understand what you mean by "individual itemised bills, with only half a bottle of wine charged on each, with a separate bill for any wine left over etc etc"? If you are in a restaurant, and it passes midnight, can you use 2 days allowance on one meal?
At some point common sense has to take over? Doesn't it?