How does Chief define the therapy in the institution in One Flew Over the Cuckoo's Nest?

Chief believes that the institution’s therapy consists of
control.  Chief believes that the institution wants to control all aspects of the
patients.  His conspiracy extends to government and industrial interests that want to
reduce all of the patients, and all of humanity, to mechanized automaton form.  Chief
feels that there is no rehabilitation or care of patients, but rather control and
dominance.  This is evident in his belief of the “fog.”  Chief believes that all those
in the position of power and authority over the patients engage in this so that they can
end up controlling the lives of the patients, preventing and precluding them from
exercising their own voice in the construction of their destiny.  It is in this where
Chief acts at the end in that he has gained the courage from his friendship with
McMurphy to take action.  His actions at the end demonstrate his belief that he will
never be in control of who he is and what he shall do while he is in the institution as
they will never allow it.  When he leaves, it is the absolute statement that life is a
force that cannot be repressed or controlled, something that happens frequently in
Chief’s mind in the institution.