Hard Cash

In Hard Cash by Charles Reade, a father incarcerates his son in order to cover up a crime. The doctors who admit him have a kickback scheme worked out with the hospital--they get money for each patient admitted. Once in the hospital, the hero tries to prove his sanity but finds it impossible to battle against doctors who refuse to look past the diagnosis that caused his admission to his actual mental condition. He also must negotiate with the head of the hospital, a woman who is madly in love with him and refuses to allow him out of her sight.