On a macro level, there's an employee shortage (which is good, because the alternative is a job shortage), and over time workers will shift away from the least

On a macro level, there's an employee shortage (which is good, because the alternative is a job shortage), and over time workers will shift away from the least important jobs. Arguably, fast food workers are some of the least important jobs, judging from pay. In the long run fast food might stop existing, or rather, the fast food worker might stop existing, replaced by machines or other food sources.