Metonymy, like metaphor, is also an important cognition means and because of its pervasiveness, contributes a lot to polysemy.
Moreover, it is likelier that the economy, supported by low interest rates and stimulus programmes, is reviving IT, rather than the other way around—a function of IT’s increasing pervasiveness.
To get a good look at the pervasiveness of the stigma attached to dark skin in India all you have to do is look at the want ads for Brides and Grooms in the newspaper.