>Racist, sexist, and other group-biased social structures often constrain and disadvantage individual members of the notionally "priveleged" class -- particularly those least interested in preserving the bias.
Agreed. I'm not saying everything is black and white. It's a generic concept.
>use of "majority" when the intent is to refer to the structurally-favored class is problematic
Not that kind of majority.
http://en.wikipedia.org/wiki/Majority_%28sociology%29
A minority group is a sociological category within a demographic. Rather than a relational "social group", as the term would indicate, the term refers to a category that is differentiated and defined by the social majority, that is, those who hold the majority of positions of social power in a society. The differentiation can be based on one or more observable human characteristics, including, for example, ethnicity, race, gender, wealth, health or sexual orientation. Usage of the term is applied to various situations and civilizations within history, despite its popular mis-association with a numerical, statistical minority. In the social sciences, the term "minority" is used to refer to categories of persons who hold few positions of social power and whose position in society is underprivileged.