What are some examples of conflicts of interest in the financial industry?

When a bank approves a loan to a borrower who is creditworthy

When a financial advisor recommends a particular investment product to their client even if it is not the best investment for the client

When an insurance company denies a claim to a policyholder even though the claim is valid

When a stockbroker trades in a stock that he or she has previously recommended to their clients, taking the same side as her clients.