Funny, those words are roughly cribbed from a line in "Dirty Pretty Things":

The doctor: How come I've never seen you people before? Okwe: Because we are the people you do not see. We are the ones who drive your cabs. We clean your rooms. And suck your cocks.

http://imdb.com/title/tt0301199/quotes?qt=qt0159994

Whoever is writing these notes needs to come up with something original if they're going to accuse someone of being a parasite.