No I haven't and I doubt I will ever.
The whole point of me joining hubpages was to write. I enjoy writing and one day hope to write a novel. This is the forum I use to master my art and in hiring someone else to do that would be counter productive.
I write on hubpages for my desire to write and the extra money is a great incentive but I wouldn't let anyone else do the writing just so that I have more hubs in order to generate more revenue. That said .. I don't have any problem with others hiring writers to do that job if they look at hubpages as a source of income.