The salesman sold a computer system to a far and foreign firm, and upon visiting them several months later he was alarmed to see that it was still in the original packaging.

"Anything wrong?" he asked.

"No," beamed the accounting manager, "through-put has increased, efficiency has improved no end!"

"How's that, then?"

"Every morning," he said, "I tell the staff, if you don't work harder and more efficiently, the machine is going to replace you."