I'll agree about the low pay if you're talking about servers & housekeepers (though they don't have much time off at all), but as a photog, I made upwards of $1.5k a month with no expenses for housing or insurance...Not sure what the dancers, musicians & actors make, but they had a hell of a lot more time off than I ever did.
Now, I have no idea what pay scale an FA makes or how much sightseeing they can squeeze in.
Obviously living conditions are different, but from a traveling standpoint, I am curious as to which is better.