Comment by kragen

They haven't:

https://www.americanbanker.com/news/call-centers-and-bank-br... "Call centers and bank branches are major fraud liabilities"

https://www.bai.org/banking-strategies/beating-crooks-at-cal... "Aite Group’s findings that 61 percent of fraud can be traced back to the [call] center are equally concerning, as is its prediction that contact center fraud loss will double by 2020."