There is only one tool to describe wage inequality. This would actually add more emphasis to what's happening in the middle.
To the extent that we're concerned about people at the top getting an increasing share over time, they're not necessarily describing that phenomenon.
I've provided some charts in the brief that I've given that show alternative ways of describing that. They're mostly graphical in nature.
In our discussion paper we also talk about the role of income mobility, that is, the idea that from year to year a person's income may vary, and what impact it could have on wage inequality and whether it could help. Basically the big facts still remain, even when we take into account the idea that from year to year each person's income may vary.