Gender & Ethic Studies profs earn more than peers???

According to Campus Reform colleges are paying professors of various "Studies" some $12,000 a year more than the average.  Which is odd, seeing us how "Studies" majors are mostly unemployable when they graduate.   My standard advice to college students is to decide what they want to do after graduation, and then pick a major that makes them employable in their chosen field.   Why should colleges pay professors of a boutique course of study extra, when that course of study is an invitation to bankruptcy for any student foolish enough to major in it??