Value isn't solely a function of effort, no. Some activities are more fruitful than others. This is a universal truth by the way, not simply a property of our current economic system. If I work up a sweat driving nails into wood with a hammer, that won't make whatever I'm creating stronger than if I used an electric screwdriver or nailgun.
That's an interesting (and ridiculous) way to spin the numbers.
One doesn't have to work x times harder to bring x times more value to a company.