Minumum wagę for fast food employees seem to be heading for $20./hour for fast food/burger joints in California. The same old burger will soon cost much more if successful. Only you get to decide how badly you want that burger. So, in this case, once you keep raising the tip level, it becomes very awkward to return it to your prior comfort level of tipping. You can easily transform yourself from a high roller into a cheapskate, in her eyes, in a split second if the big head overtakes the little head. LOL. Just saying... If tipping becomes problematic, you still have lots of options... You ultimately decide. Lots of incredible girls abound....