I doubt that guests in restaurants will start flipping their own burgers, or folks will stop ordering home deliveries, so I don't think the demand is a problem

I doubt that guests in restaurants will start flipping their own burgers, or folks will stop ordering home deliveries, so I don't think the demand is a problem here. Real problem is on the other side, the vast supply of that segment of the workforce. These are easily replacable employees, so employer has unfair "if you don't like it, leave it" leverage over them - plus most of them can't really afford to be picky about jobs as they need that money badly. And employers exploit it.