I feel that users with high reputation gets up-voted more even if their answer is not as complete as another with less reputation because of their reputation. I do not have any problem with that. In fact, I believe that these users have the right to be respected for their contribution to SO.
The only problem I see is when a user with high reputation gets down-voted and his reputation lowers equally to someone with low reputation. Should a down-vote lower a user's reputation proportionately to the amount of reputation that user has?