Some do, some do not. I listed several in my previous post. Fox News - the flagship of conservative TV news, hardly ever does despite publishing and broadcasting numerous lies. 

Prestigious institutions get nusiance lawsuits like Palin's all the time. Her lawsuit is going nowhere, since defamation is ridiculously difficult to win when the plaintiff is famous. The bar is set so high by literal centuries of precedent that either Sarah is cynically filing the case to get public attention, or is too ignorant to predict its inevitable failure. Either way, if you're contending that NYT did the wrong thing by issuing a retraction or that retractions don't happen as a matter of course in all (legitimate) newsrooms, you'd be wrong.