Pegging the rise of maximum compensation to the rise in the minimum will go a long way towards avoiding global disruptions.
The appropriate maximum wage that society should have will be a critical issue in this century. It is generally agreed upon at this point that a neurosurgeon should get compensated more than a tour guide. The Soviet experience of a relatively narrow gap between highest and lowest compensation (top company manager officially earning 3-5 times the entry level worker) shows that society's progress stagnates if tangibly unequal abilities and contributions are rewarded with compensation that's perceived as relatively equal. Yet various banana republics (United States included) around the world demonstrate that stagnation also sets in when wage inequality gets sufficiently monstrous.
It is not enough to look at relatively egalitarian societies like Japan or Sweden to try to find some golden maximum/minimum ratio. What is needed is a common sense and/or philosophical framework that 1) justifies a certain income ratio and 2) creates conditions compatible with human nature and self interest that allow the set ratio to be maintained.