> Not all automation is economically efficient - i.e. it's cheaper to hire outsourced janitors than building state of the art cleaning robots to automate their jobs.

And a trap many companies large enough to afford full time janitors don't realize: with outsourcing janitors they're relinquishing a lot of control towards the service provider and the work quality. The result more often than not is disgruntled employees waiting for days for stuff such as replacing a cracked toilet seat to be done.