In the long run the robot is cheaper
the robot won't join a union, ask for benefits, ask for days off, demand a high salary, or need unemployment insurance, etc. After X days or months the robot will have paid for itself by replacing a person. The robot can be remote operated by someone in India to hardware reset the machines when they go wonky.
So the real money would be in robot repair, if they didn't hire an H1B Visa worker from India for that. ;)
"Lady I only speak two languages, English and Bad English!" - Corbin Dallas "The Fifth Element"