Conservatives typically draw strength from (historically anyway), the military, the religious establishment, the economic elite and historically, the upper middle classes (recent realignments aside, historic fears of "the plebs coming to kill them").
Nothing to say on the topic at hand, but this seems totally wrong to me.
Especially from a historical perspective, the upper middle class/bourgeoisie is usually the group most associated with liberalism, no? At least that's how I've always been taught and what everything I've ever read has said.