Gnnn don't even get me started on Disney...they had one of the all-time great comic artists in Carl Barks, and treated him like a day labourer. Then came Don Rosa who single-handedly saved the Disney magazines in the '90s, and he got a same treatment. Vicar, perhaps the greatest Donald Duck illustrator of all time, virtual unknown over his career.
The thing is, Disney comics still have a quite big circulation in Europe. If somebody were to pencil a really great Scrooge McDuck story, I guarantee it would get millions of readers. So you would expect this to be a coveted position for talented artists and writers, but why would they want since the previous guys got jack for their efforts?