The answer to the question in the title is NEVER so long as they have the licence fee which enables them to lead a lavish style at our expense.
Just in the last few days we have the following stories from the press:-
1. Taxis - In the year 2013-14 they spent 11.9 million on taxis up 1.2 million over the last two years.
2. Swearing - Wolf Hall contained the C word in the last episode.
3. Sir Cliff Richards - An independent report by former Chief Constable Andy Trotter concludes that Sir Cliff had his privacy violated after a secret deal between the police and the BBC to film a raid on is house over the alleged assault on a minor back in 1985. Sir Cliff denies the charge.
4. Country file - Christopher Booker today writes in the Daily Mail on the bias of the BBC's flagship programme country file. He cites two CLASSIC examples.
a. Decline in farmland birds - They will ONLY talk about the loss of habitat and the use of chemicals on the land but skirt over and avoid ANY mention on the far bigger problem of an increase in predators such as magpies, sparrowhawks and buzzards but just as significantly foxes, mink and badgers.
b. Growth of windfarms - The programme and its main reporter on this subject Tom Heap are clearly pro windfarms seldom if EVER mentioning the key issue that when the wind doesn't blow no electricity is generated and that they kill numerous birds and bats.
The BBC provides a platform for the likes of the now totally PC RSPB and RSPCA and other like minded green pressure groups. Christopher Booker concludes 'In reality, nature and the countryside are far more complicated, But the fluffy-headed environmentalists in charge of Countryfile never want to tell us that. They have found that the secret to bumper viewing figures is to sell us a pleasingly make-believe image which in many respects is no more than a beguiling but, in fact, rather nasty fake.'
The BBC don't live in the real world but in a highly privileged position, using our money, in which they promote their 'Guardian' agenda on the rest of us and ignore any pleas to change their ways.