"Nanny" may not seem like a lucrative job, but there are now some nannies out there making more than a typical Wall Street salary.The New York Times Magazine's Adam Davidson writes this week that a new kind of elite nanny is now capable of raking in a six digit salary, despite that the average nanny might make about $15 to $18 per hour. Zenaide Muneton, for example, makes $185,000 a year, plus a $3,000-a-month apartment on Central Park West (and a Christmas bonus). That salary rivals the $200,000 some Russian and Chinese families are willing to pay for a top-notch nanny.So what's her secret? Writes Davidson: The simple answer is hard work-plus a strange seller's market that follows a couple of quirky economic principles. A typical high-priced nanny effectively signs her (and they are almost always women) live over to the family she works for. According to Cliff Greenhouse, Pavillion's president, that kind of commitment is essentially built into the price....