I've seen a lot of computers sold with this promise. I've not seen one that delivered on the promise. The issue today isn't about firing employees, or even about reducing employee workload in most cases. Usually, it's not even about accomplishing more with the same people. The promise of computers is competitiveness.
Computer use can lead to quality and quantity of service.
In fact, it is often counterproductive. A CPA trains the employee, another employee is hired, and an accountant takes two or three days to fix the books at year end. And in the process, accuracy of the books during the year is lost. Computers can give a business control. They can increase sales.