[coopdog]

It's been well known in HR for a long time that money is just a 'hygienic' factor. Pay your employees too little and they'll be bitter, but paying them too much doesn't make them more motivated or more loyal in the absence of other positives.

You pay them enough, and then make sure they have rewarding work, a supportive environment and a boss who understands and empowers them. Money is just the start