that wont happen, because they already have up to the 2016 Olympics booked(It Will Be In Chicago), and cities are proud to host the Olympics.
It Provides a Symbol of Status for A City, They are already are 4 Olympics ahead and after every Olympics, they have another city volenteer, it would be funny if no one volenteered 1 year, but the way its going i don't see it happening for at least 80 years.