Hey Dave, sorry for taking so long to get back to you. This is my first time in the forum.
You bring up a good point, but if that were the case, then why not tie 3 properly colored egg yarns to a wet fly hook like you would RB hanging in an outlet? It might just work.
On the other hand, if I am correct, carp have an acute sense of taste and smell that they favor over feeding by vision. That is what makes you so talented if you land one on a (non-scented) fly. However, we both witnessed the occasional 29"+ carp taking something off of the surface with mouth wide open in a rolling fashion. I'd then have to say the flavor of choice would be a mass a green algae (probably you could make an imitation using some of that green floral stuff, with a big 2/0 hook in the middle of it). I think I'll pass on that "match the hatch" option!
A local that fishes Green Lake says that he occasionally trolls a wooley bugger (figure that) a picks them up in the flats. Well, I guess the whole lake is generally 7' deep, so the flats could make up a good deal of space. I guess that I'll have to conjure up an idea of a fly that somewhat resembles a pork sandwich or something else that the bait crew uses to capture these guys. Let me know if you unlock the mystery of "Carp on the Fly."
-Tyler
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Streams are made for the wise man to contemplate and fools to pass by.
(Sir Izaak Walton)