I heard this, I heard that...Not very helpful, really.
How about some facts (I spent a month, aboard, in Vuda Point this past season):
Yes, Vuda is a "closed" marina, in that only certain workers/ vendors are allowed to work there. Similar to several other marinas
I've visited, both in the States, and abroad. This is done not to peeve you, or get your conspiratorial juices running, but to control quality. Don't like it? Leave.
So, you really want to hire a certain day-worker? Fine. OOh, a 30% surcharge. Sounds like gouging. Or as you say, disgusting treatment of the client. Well, do the math. An average hourly rate, for non-skilled labor, is $4 to $6 U.S.. No typo. $4-$6.
The marina asks that, if you bring in your own worker, you pay hm an additional 5 bucks TOTAL so he can pay the surcharge. That's what we're takling about here...$5 a day. "White mafia"? Give me a break.
It was my experence, and many others who were there with us, that Vuda Point, and Baobob, offer a very valuable servce, and cruisers are very fortunate to have them there in that part of the world.
My advice...Know what you're talking about, clean your own damn stainless, and stop spreading rumors.