It's literally one of the least skilled jobs in the nation. Almost all fast food chains reward unskilled laborers with longevity. Promotions, manager, store manager, district manager etc... which comes with pays raises. My POS brother step son is probably 30 now, began working at one of the burger chains about 12 or 13 years ago.... he's some kind of manager... it's not a great living but is enough for him to have his own place and support his witch and her rugrats.