Earlier quoted context omitted.
It also allows to pocket more money instead of paying it to employee. Remember, many people in USA believe that corporation has duty to increase shareholder value. And similar stupid ideas.
Not sure if you are being facetious, but that's in fact the law. The board is a fiduciary of shareholder (investor) money. Is that a great idea for society? Not sure, until it changes we live in the world we live in. And on the productivity point, that makes a good theoretical case but it is just not demonstrated by historical data. In the US, in the past 50 years, it even has a name (the pay-productivity gap or the…
https://en.wikipedia.org/wiki/Dodge_v._Ford_Motor_Co.
> Dodge v. Ford Motor Company, 204 Mich. 459, 170 N.W. 668 (Mich. 1919) is a case in which the Michigan Supreme Court held that Henry Ford had to operate the Ford Motor Company in the interests of its shareholders, rather than in a charitable manner for the benefit of his employees or customers. It is often cited as affirming the principle of "shareholder primacy" in corporate America. At the same time, the case affirmed the business judgment rule, leaving Ford an extremely wide latitude about how to run the company.
[...]
> In the 1950s and 1960s, states rejected Dodge repeatedly, in cases including AP Smith Manufacturing Co v. Barlow or Shlensky v. Wrigley. The general legal position today is that the business judgment that directors may exercise is expansive. Management decisions will not be challenged where one can point to any rational link to benefiting the corporation as a whole.
The caveat is important. If a company says, "Customers don't like it when rich people in suits treat like shit. Therefore, if we spend a small amount of money treating better, this will make our customers happy, and they will buy more of our products, recouping the cost and bringing in more profit for our shareholders." Substitute the environment, animals, customers, employees, people in Africa, cancer patients, the children, etc. It doesn't matter if you're completely full of shit, you just have to make the argument.
So while you're correct that companies have a primary requirement to increase profits for their shareholders, in practice, this requirement is incredibly loose, to the point of not actually being a requirement at all.