Is power an appropriate consideration in healthcare ethics?

Mrs. Lewis was head nurse on a medical surgical floor in a community hospital with 250 beds. Over… 

Mrs. Lewis was head nurse on a medical surgical floor in a community hospital with 250 beds. Over the course of 6 months

Mrs. Lewis was head nurse on a medical surgical floor in a community hospital with 250 beds. Over the course of 6 months, she noticed that all patients admitted from the Shady Rest Nursing Home had signs of severe injuries other than those connected with the admitting diagnosis. There appeared to be patient abuse in the nursing home. Mrs. Lewis investigated discreetly and found no explanation possible except abuse. In accord with the obligations of the law in her state, she reported the matter to the Department of Welfare Bureau of Inspection.
The Welfare Department investigated immediately, found proof of abuse, and threatened to close down Shady Rest if there were any more recurrences. Mrs. Lewis was overjoyed until her hospital administrator, bypassing the director of nursing, called her in and warned her that she would be fired if she reported any other instances of abuse. Shady Rest sent the hospital a lot of business, and good relations had to be maintained.
Mrs. Lewis was even more shocked when she discovered that the administrator was a golf partner of the owner of Shady Rest and was doing an old buddy a favor. Despite fears of retaliation, Mrs. Lewis consulted a lawyer, who threatened the hospital with exposure and with penalties that would follow if one of its employees failed to follow the reporting provisions of the law on abuse in nursing homes.Did Mrs. Lewis act correctly? What should she have done if she could not have afforded to consult with a lawyer? In what ways can whistle-blowers protect themselves? Must the art of intimidation be part of the toolbox of healthcare professionals in order to protect their patients?
Is power an appropriate consideration in healthcare ethics?