Quote Originally Posted by Carnage View Post
The tape on Walt's hand was a sign from the director/writer that he knows his call is being taped. There is no way Skylar was going to get off scott free. This call saved her from the worse portion of punishment.
Did you read or see that somewhere? It definitely sounds plausible and is a clever way to add depth to the scene.

Everyone should also keep in mind that no one (still alive or who would talk to the feds) knows how much money Walt made except for Skylar. Saul and his boys know of 7 barrels loaded with cash, but with the limited info the feds have (unlike all the Hank had), they wouldn't know to pursue Saul and his handymen.