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A robot may cost money but a robot won't sue you, won't claim unemployment, won't quit, won't show up drunk, etc...
Once installed most robotic operations are not maintained to the extent that they should be so the line of them needing people to service them doesn't really float. Most companies will simply hire a guy to work at the company to resolve robotic issues either part or full time so outside help is rarely needed.
I've seen benefits on both sides. Robots will do jobs people do not want to do however at the same time a robotic operation is a real wakeup call to an economy.
So much goes into making even a simple robot do something you could say to yourself boy look at how much work has gone into building this thing; that must really help jobs but it doesn't; unless your idea of jobs is creating them in china since that's where most of it will probably have come from minus the china price-tag.