I'll tackle this.
- If they are expected to do 5-10 times the amount of software development as a regular new programmer, are they going to be offered 5-10 times the regular salary?
- Are all the other programmers at the company dramatically more effective than a regular programmer? Most competent people don't think of themselves as being exceptionally better than their peers, so if that's the case, they probably shouldn't bother.
- Or, are the other programmers at the company just regular ones, and the incoming new person is expected to be more effective than all of them combined from day one? That's a lot of pressure to put on one person. What was the answer to the salary question again?
- Many people who have developed exceptional skills in one area have neglected other areas. What types of personal problems is the company willing to tolerate for the privilege of hiring rock stars? Is alcoholism okay? How about being sexually creepy towards co-workers, due to lack of social skill practice? How about body odor? Not that all exceptionally skilled programmers have these types of problems, but you have to make a trade off somewhere. Really, how much are you paying them? Because someone who is 5 or 10 times more productive than a normal programmer without being a socially impossible weirdo is likely already in a job paying far more than what hr had in mind for this position.
Is there no place for a programmer who's just basically competent and professional and will work for an average salary? Do you want to drive those programmers away?