Many financial experts would even further argue that it's the sign of a competent treasurer if he can make the assets entrusted to him multiply with reasonably risk-free activities 
...
...Really? Multiply the assets for himself, or for the one who has entrusted him with the money?
As for banks et al. that usually entails them sharing the returns with the depositors' and they provide other services your average treasurer safeguarding other peoples' money won't provide.
Yes that is certainly a matter that should be talked about and sorted out between the two parties. Either prior or even after if both are sensible and honest.
I don't think we should attempt to white wash or demonize until we have ALL of the details and the final agreement between the two parties concluded.
I certainly DO NOT THINK we should have people that have done THE SAME or WORSE all gathering and colluding into a lynch mob here for their OWN PERSONAL ENDS.
This is why you can not have people that are guilty of the same or WORSE trying to punish people without turning the entire board to a warzone
People dishing out disapproval/disgust/indignation and punishment need to be SQUEAKY clean themselves or human nature says fuck that bullshit.
(that is not aimed at you since we have no experience with you here, we are referring to others gathering)