Your example is wrong. Many companies are careful not to use suppliers that use child labor because if they don't the negative media attention will collapse their market and in turn result in less money.

A better example is today many companies have no problem with doing business with suppliers that donate to planned parenthood, even though that means they are morally contributing to abortion. I know right now many of you will be screaming but abortion is morally okay, and others will screaming that they wish they could punish such companies...