the owl and the olive tree

I would love, love, love it if publishers would offer bundles of ebook and paper book. Like—I'm making up numbers, bear with me—if a paperback is $8 and the ebook version is $6, I'd pay $12 for both the paper copy and a download link. If a hardcover is $20 and the ebook is $10, I'd pay $26 for both. Like that.

I wonder why no big presses have done that. Perhaps they think they can get people to pay full price for both? But that doesn't seem like it'd happen very often.