One who only has two set sets of interests to work for >

1: The Depositors not shareholders or traders interests

2: and the interests of the culture in which they operate ie not trading against the interests country they operate in.

ie a building society where the depositors, are the shareholders and any profits to be had by the trading arm are shared by all where a small level of sensible distributed risk is taken with my deposit and in return interest is paid on my account on the basis of profit share from trading to all depositors. Its not really complex is it. you know how all building societies used to be, before they were all bought up and despoiled by the majors for their own advantage.