A lot of these folks also seem to believe that an underpaid part-time babysitter = nanny. Like, no. A nanny is someone who earns an entire salary doing nothing except caring for a particular child/ren. IMO they know the difference but they just think it will sound a lot better, both to a potential applicant and to other people. ("Meet you at the bar tonight? Sure, sounds good! Let me just shoot a quick text to my nanny...")