It's also worth noting that maintenance people normally get more (significantly so for the more complex machines) then normal crew, and given how frequently the

It's also worth noting that maintenance people normally get more (significantly so for the more complex machines) then normal crew, and given how frequently the machines break already you start seeing the costs of a robot being more then the cost of paying someone to do the work. Further the machines get cleaned constantly, and are deep cleaned every night. That takes people, and given how low the crew numbers are normally, you're not going to save anything by having robots make the food.