Here is an interesting article about how call centers in India are experiencing as much as 50% turnover, even though the wages are very good compared to other jobs in country.
On and Offshore: Call Center Economics
I think this speaks to the nature of call center work itself.
Purgatory: A place of suffering and torment with an unknown duration. In Roman Catholic Theology-the place where the dead are purified from their sins.
By Rage Against The Machine