What is the meaning of hard work?

"The meaning of hard work in a manual economy is clear. Without the leverage of machines and organizations, working hard meant producing more.

Those days are long gone. Most of us don't use our bodies as a replacement for a machine - unless we're paying for the privilege and getting a workout at the gym...

Even if you're a workaholic, you're not working very hard at all.

Sure, you're working long, but "long" and "hard" are now two different things. In the old days, ... hard work meant more work...