"Questionable ethics" refers to a situation or action that is morally uncertain or doubtful. It suggests that the behavior, decision, or conduct may be morally wrong or conflicting with accepted principles of what is right or fair. Full definition
I am not making an accusation here; I am simply pointing out the appearance of questionable ethics. (jonathanpelto.com)
Is reporting misconduct worth it, or should employees quietly ignore questionable ethics to protect themselves and their jobs? (recruiter.com)
These are prices from big brands that were, even then, producing en masse with questionable ethics at what were considered low to moderate prices. (elizabethsuzann.com)