In essence any professional relationship must be built on trust and honesty. Manipulating the client for individual needs through any of the points discussed above is unethical. It is also a short sighted professional strategy as it will only be to the detriment of the consultants professional reputation. Being a professional means having a set of standards and equally a set of responsibilities. Consultants need to recognise that being an expert in one discipline does not automatically mean epert in all.
Reputation is built on trust, honesty and integrity as well as delivering the desired outcome.
Unethical practices will have negative consequences for both the organisation and the consultant. Being aware of one's ethical responsibilities wil enhance reputation and in the long term provide a more succesful practice.