It's possible that I invented this and it doesn't really exist.
What I remember: one character is proudly showing off facets of their dystopia. They say that they've successfully reduced the number of TV channels to [some small number] and the goal is to soon reduce it to three, with an ultimate goal of only one.
I thought it was Nineteen Eighty-four, but my Google-foo has been inadequate to locate the scene. Other prime candidates are the major dystopias: Fahrenheit 451 and Brave New World. I most likely encountered it (if I didn't invent it in a dream) in a book during my school days, a little over a decade ago.