I don't think the big issue is the toilet cleaning.
Chris has put up with extra work load which he is not rewarded for.
If you are employed to do a job, then end up having to carry a bludger and do the work of 2 then you should be renumerated for that. You can't expect to get 2 for the price of one, if doing more than orginaly in job description.
As for toilets, Yes I've cleaned up after pigs that I worked with used them , and some peoples toilet habits have a lot to desire. I've seen cattle trailers, that after the cattle arrive at the abbatoir were cleaner than some peoples toilet habits. One place I bought and fitted a gate bolt and lock and locked the toilets, and told the culprits to go and use the bushes as their toilet. They got the message quick smart.

