@stoneMason-- I agree with you. Especially utilitarianism seems like an adaptation of ethics so that people can continue to make money and protect themselves in the global market. It's difficult to justify tariffs and embargoes with the classic ethics theories.
Ethics are so difficult in general though. Because many times, business have to choose the greater of two goods or the lesser of two evils. Decisions are not always black and white. What's best and most ethical is not always apparent.
But I believe that this area of thought and study needs to be expanded upon. We have a growing need for ethics in business, trade, national and global economies. Because the decisions that are made by corporates and governments impact the lives of millions of people in the world. So we can't ignore this topic.