For that question: Like, duh! Yes.
The events seem like the result of a communication problem. As much as some providers want to milk a trip as much as possible, they might not have known exactly what to pack or wear. I wonder, with all the preparation and logistics that such event takes, why weren't attire and expectations about expenses during the trip discussed prior to leaving? That doesn't look like an unreasonable conversation to have in preparation.
Traveling to the UAE does require a little bit of additional information, just like traveling to certain other destinations. Also, in my experience, when certain level of elegance and attire is required/expected, it has become a need to explain to people what they should wear, and even with that, some don't get it.
I am in no position to finance such a trip, nor am I single/free enough to do so, which means that this is just speculation on my part. I'd include attire, expenses, gifts and/or other extras in the discussion before the trip, so there is an understanding of expectations. They are in the business of pleasure, so I imagine that they will do just like travel companies do, continue charging for everything that happens along the tour. That should not be a surprise (IMO).
I hope everything else in the trip went well (meaning, they didn't embarrass or dissed you).