Tip nothing
Tip everyone
Tip the suggested amount
Tip a lot more
Tipping policy is fair
Tipping policy is unfair
After a few dozen cruises over the years and thousands of threads dealing with this topic, we now tip the required amount and always (there was one exception) go well above and beyond the daily charge.
We tip our bartenders and our drink servers with each drink
We give CASH because it has no calories, and no one is allergic to it.
I don't know and don't care how well their earnings compare with workers in the U.S.A., the Philippines or any other country in Asia or Europe.
I do know that of the three crew members that I have had long conversations with they are doing well and live their lives and those of their families above what they would be earning at home, in Panama, the Philippines and in Switzerland.