Should a person do something that can help him make profits

Should a person do something that can help him make profits, but hurt other people in the process? At Enron, the employees only believed in earning more money for the company without ethical bottom lines. Many managers in the company did unethical things to make profits, even though they knew their actions could harm other people. Although many employees and managers, even the CEO, knew the truth, they refused to disclose it, and continued to do unethical transactions. Gradually, the desire for money made people in Enron more and more greedy and ambitious. People are supposed to earn profits in ethical ways. Additionally, if people see someone do unethical things to earn profits, they are supposed to point out his mistakes and tell the truth to this person instead of ignoring it, thus avoiding more similar mistakes later, and their serious consequences.