system
Given the following post, respond as if you're commenting on Reddit:
human
If fast food workers are successful in raising their wages to $15 an hour, many will lose their jobs after the restaurants shift to more automated machinery CMV

First of all, $15 an hour is more than many managers make already at fast food joints.  So the payscale would make no sense with employees making more than management.

Second, the cost of labor would more than double for each employee.  And since fast food is generally a low skill job, fast food restaurants will opt to use more machinery to operate.  I.E., self serve registers, more automation in food prep, and operating with as few human workers as possible.  You could easily pay a technician $15 an hour to keep the machines functioning correctly and get much more for the dollar than a regular employee.

That said, this will result in fast food employees getting fired.  But not only that, technicians and efficient management will be emphasized and it will require more skill to have the possibility at working for a fast food restaurant.
gpt
Automation takes time and technology.  The more immediate impact to the workers would be the sudden competition for the jobs from semi-skilled, more reliable, workers.   The sort of people who are currently in the 12-15/hour range doing work that requires minor intelligence and showing up every day.     They'll easily outcompete the lowest performing fast food workers, meaning that their 'big win' has put them squarely at unemployed.