Tunnel Vision (1976)

From an IMDB review:
If you don't think today's American comedies have been dumbed down, you should give TUNNEL VISION a look. Crude and tasteless, extremely dated, but very, very smart. It's amazing how many jokes you miss because here, it's all in the writing. Sure, kids today won't get a lot of the 70's pop and political references, but if you actually paid attention in your history and political science classes (as well as TNN and TVLAND), it shouldn't be a problem. Can you say that about TOMCATS and AMERICAN PIE? The wraparound segments of a federal hearing pertaining to the effects on the nation for watching the Tunnel Vision network are eerily prophetic given the current Media Marketing Responsibility Act Lieberman and Clinton and Kohl are trying to push. Politically Correct viewers may balk at some of the bits on race, but the film skewers everybody, plus it's obvious that there's more going on then just a cheap laugh at different minority (and majority) groups' expense. TUNNEL VISION is more than just an old sketch comedy movie from the 70's, and it's sad that most modern comedies can't approach the cerebral humor on display here.