To be sure, a well-respected school of thought remains that companies must first serve their shareholders: By maximizing the returns of investors, corporations do more good for their broader societies.
Instead, investment banks should serve their shareholders and partners by maximizing profits and compensation while explicitly stating that no government aid will ever be taken should private investment dry up.
Paradoxically, focusing on maximizing shareholder value ends up making less money for shareholders, because it leads firms to do things, like the recent JPMorgan gambles that actually destroy shareholder value.