Earlier quoted context omitted.
That isn't the way a business works. There is no intrinsic value to "staff", positive or negative. The value comes from the way staff (or any other resources) is utilized. Building twice as many widgets by building and staffing a second factory could have a huge negative value if there is no demand for twice as many widgets in the market, for example.
So then the solution is to not fire people, but manage them better on something more profitable. What makes you more money in this pet example you've set up: having 1 widget factory, or two factories producing different widgets that are both in demand? The latter, obviously, or else amazon would still be entirely in the business of selling books today.
Well, yeah. I mean the entire endeavor of operating a for-profit business is to find the combination of resources/effort/ideas that creates value. The problem space is enormous though and more often leads to failure than success. If you see a successful combination though, stop posting here and start your own business!