It is a little insulting to say you're paying a teacher $20,000 to take a certain job when you are really paying them $10,000 over two years. You might as well say "What happens when you pay a great teacher half a million dollars (over seven years)?" That applies to quite a few teachers in Providence.
$10,000 is not that much money. We would be happy to take a $10,000 pay cut to get OUT of urban education at this point, and take a job teaching, oh, ANYWHERE SANE, as would thousands of teachers across the country.