But some of the answer also lies in the competition for educators in increasingly wealthy suburbs.
In 2007, fabrication rose 18%, helped by demand from China's increasingly wealthy middle and upper classes.
Dan Lavette grows increasingly wealthy, but his happiness is short-lived.
As the only son of increasingly wealthy parents he wanted for nothing.
"The real question is whether the Government going to ask the increasingly wealthy to support the increasingly poor."
Following his term as governor, he became increasingly wealthy from his business interests and owned a controlling share in many companies.
He became increasingly wealthy in his later life from his business investments.
About one-third of Russia's increasingly wealthy 143 million consumers are online and that number is getting bigger.
In this way women could become increasingly wealthy inheriting both from their fathers and husbands.
The rapid growth of the business made Haynes increasingly wealthy and he became a millionaire that year.