Milking the cash cow?

I know people have to make money, and if you've had a good innovative idea you would wish to squeeze as much capital out of it as possible, but I do find it depressing when pointless spin-offs just devalue the original. I am willing to accept that George Lucas always intended that there would be a Star Wars I, II and III (after all, the original was always titled Episode IV) so even if for the most part they were somewhat disappointing, at least they were part of the overall oeuvre, but the news that he now has plans for a TV series leaves me less than impressed. Victoria Wood had it right with "dinnerladies" - when you've created something special, take the plaudits and walk away.