I remember some years ago talking to the CEO of a company that was doing a great job of selling to us - I mean way over expectations - fantastic.

I asked - how much are you paying that guy - he is great? the answer was - "an OK salary" - but they did find out what motivated him - for this guy it was vacation time.

Everyone wants a salary that reflects their worth in a business - then (for peak performance) everyone might have different motivators. It might be recognition, a great car, a better office - it does not matter - find out what it is and supply it...