The BBC (again)

According to the Telegraph, 
Lord Patten, the chairman of the BBC, admitted that he gave Mr Entwistle a payoff worth twice as much as he was entitled to to so he would go quietly

The obvious question is "Why did Patten want him to go quietly?"
What was there at the BBC that he might make a noise about? Was he likely to reveal the total chaos and mismanagement at the BBC that existed when he took over, which Patten, as Chairman of the Trustees, had done nothing about? It must have been something that implicated Patten, otherwise he wouldn't have been in such a hurry to agree the payment which presumably came with a gagging clause.
Maria Miller, the Culture Secretary, should not be enquiring into the payment as such, but instituting an enquiry to find out what there is to hide at the BBC. She must find out what would have been said if the payment had not been made and Entwistle had gone "noisily".  There's more in the payment than meets the eye!