I'm not sure if this is an Australia-only thing - and I was under the impression that if was far from being so - but here the responsibility to shareholders of a corporation is solely fiscal.

The reasoning behind this is that shareholder needs tend to differ. If shareholders wish to engage in philanthropy, the corporation is not the ideal (shared) vessel for doing so. Instead, individual investors may receive their asset's rent and choose to distribute their earnings as they please; management is employed to run the Corp and not make decisions for the shareholders' philanthropic activities.