Ask most slave owners a few hundred years ago if it was ethical to whip slaves (or even own slaves, for that matter) and you'll get one answer, but quite a different answer from the slaves themselves.
You'll get different answers to this question whether you ask it of employers or employees, capitalists, socialists, or communists, people who feel exploited or the exploiters themselves, and so on.
I'm not sure how much one could make out of such a survey other than on controversial issues there are great differences of opinion.