I have a friend in this industry and I think your response excessively misses the point GP made. Auditors who actually succeed in flagging child labor find themselves without work -- either because of actions of their employer, or because their employer gets a reputation and businesses who employ child labor don't want the spotlight.

It isn't that Nike (or whoever) wants to employ children, what they really want is to not get caught employing children. And they also don't want to pay higher wages, and they don't want to pay supply chain auditors. So if they can get away with paying a rubber-stamp auditor, they can claim they did their due diligence and wash their hands of it.