And from a more rational point of view (seriously "swanning around in a 4bed? Have a word with yourself)
I understand your POV Entirely. My current au pair is the same.
She gets paid above average for the area, and certainly has more "spends" than I do!
The difference with ours is, she doesn't stay in her room, she just sits in the living room on her damned Mac all day and night. (And that's really annoying hearing click click click as I'm watching TV)
I had a chat with her, gave maps and brochures. Directed to websites, my old au pair talked with her and recommended places.
Nope, she just stays in, running some kind of business we think, from her laptop.
So no advice, but lots of sympathy.
And to those saying "don't have live in help" blah blah, it's not always that simple. By a long shot.
In my situation, if we didn't have an au pair I couldn't work. Couldn't afford a nanny's prices (and frankly during school terms of would be rediculous to have a nanny for three hours a day!) And there are no child minders.
So less judgy pants.