in respect of this particular situation, I do find some of things in your first link a little odd. (I haven't watched Dispatches; I never do.)
There's an element of 'a friend of a friend told me' about some of the reporting like the Welsh MP saying that another MP told him he heard...
As you did not watch the program it does put you at a disadvantage it was certainly not a friend of friend told me situation .The Welsh MP was part of a committee investigating the allegations !
The Murdoch way would be much more likely to be giving Coulson an Asian TV network to run or buying him a trade publication to have as his own.
I do not really understand your comment there ( but as you say you did not see the program it is understandable)as surely it is more useful to have a person allegedly working inside the cabinet office !!
Remember David Cameron did go to great lengths to protect his communications director last year it may come back to haunt him at a later date