Deceiving people for one's own material gain can be called:

The term that best describes the act of deceiving people for one's own material gain is fraud. Fraud involves misrepresentation or deceit that is intended to result in financial or personal benefit to the perpetrator while causing harm or loss to the victim. It encompasses a variety of dishonest behaviors, including falsifying information and manipulating situations to gain an advantage, often in financial transactions.

Understanding fraud is crucial, especially in contexts like insurance and business, where ethical practices and transparency are expected. It emphasizes the importance of integrity in transactions and the legal repercussions that can arise from fraudulent behavior.

Other options do not fit this definition: controlled business refers to ownership and potential conflicts of interest in a business context; coercion involves forcing someone to act against their will, typically without deception; and common sense simply denotes practical judgment or reasoning, rather than any form of deceptive practice.