How about cleaning up after old people when they mess themselves? How about any of the DVD sorting facilities at Netflix, which is practically the exact job you described? How about the massive amount of call centers we have in the US? How about almost any low level job in agriculture? I don't think your imagination is deep enough to fathom how bad a job can really be, even in a first world nation.
There are plenty of people who are willing to work or already work a monotonous or difficult job for low pay here in the US.
More investment should go into automation, but given that the world labor market makes humans so cheap(mainly due to not having the care about the workers health or safety), human labor usually wins out.
Once all these jobs go to automation, what do you do with the workers? That is then societies problem really, we'll need to figure out if there should be a social net that guides people into higher education so we have people building/repairing robots instead of doing what the robots are actually doing. Given the vested interests in the status quo, this is probably not too likely to happen in the near future.