Should you demand twice as much money if the job's asking for two different sets of skills such as graphic design and computer programming? Sure you won't be doing 16 hours of work a day, but we all know that so much of the time is spent on communication between designers and developers, and if the designer and the developer is the same person, it would take way less time, and hence I think the pay should be doubled. If not double, how much more should you ask for? How much are employers usually willing to pay for such a polymath position? If you are hiring, would you prefer one polymath person or two specialists at the same cost?