To make our acts, omissions and words acceptable to the society of which we are a part.

The doctrine that holds physicians legally responsible for negligent acts of their employees is called "vicarious liability" or "respondeat superior." Under this doctrine, employers are held responsible for the actions of their employees that occur within the scope of their employment.

It can mean a few things but the clearest example is where someone says they're your agent but isn't does something that he or she had no authority to do, and the person they did it with claims something from you. If you accept the action even without though there was no authority, you are said to "ratify" the agency and bind yourself to the action.

Vicarious Liability

For the same reasons any other professional would do so. To ensure their acts and omissions are within the principles of that profession