Cultural studies has, for the most part, been interested in the production of our representations. Images are spawned in a capitalist-style system, and are sold to us by those who have something to gain from our buying them. So, what's needed is a Marxian inspired critique of the production of the representations in the world.
A good (and obvious) example of this is the marketing of logos. Everything, as Naomi Klein argues, has been branded. You don't buy running shoes, you buy Nike. Even Britney Spears is a brand that can be marketed, sold, and inspires (among some, at least) loyalty and imagination.
Having said this, cultural studies tries not to reduce social existence to the old Marxian categories of class struggle. Culture is not "nothing but" economics. It has its own meanings. And, it means that experience must be taken seriously. Cultural studies, in one sense, is just an umbrella for a whole bunch of areas which refuse to reduce themselves to one mode of explanation, e.g., race studies, gender studies, disability studies, age studies, and so forth.