tips and wages

[cbhimself]

I have learned not to trust big corporations (Google is the most recent example). I would like to know if there is any hard or objective information (other than the company itself) on how much of the almost compulsory tips on cruises (must amount of millions of $$) actually goes to the designated employees,and how it is divided. And the related issue: what are the actual real wages, in US dollars, of the average worker, especially the dining room staff and the room stewards.

I have Googled and research the subject to no avail.