Look up Erlang numbers for call centers. We absolutely know how to calculate required reps for a desired queue dwell. It is 100% a voluntary decision to degrade the Call Center to push people to web based automation. Consider this your proof. We have the equations. Executives make the active decision to not use them/use them to shift cost burden.
t. Helped implement a Call Center before, and we aimed for sub 5 minute queue dwell at all hours of the day.