You dispute yourself what you call indisputable in your own comment! Fewer jobs means potentially less money in the economy (and theory says that in most cases, more money is lost from fewer jobs than gained from higher pay).
Employers at burgers Inc hire enough people to make and serve the quantity of burgers they expect to sell. If more people can afford to buy burgers they hire more people not less.
The idea that quantity of labor demanded decreases with increased labor costs is oversimplified and ignores reality.
Or the employers decide it now makes sense to invest in infrastructure or automation so that fewer or perhaps even no workers are required. Elevator attendants are the classic example.