Not RTFT but having read various articles and listened to the R4 programme it would seem that there have been problems for a while, which the founder, senior managers and trustees have failed to address. I wonder if the charity got too big and complex for the founder to remain in control as she didn't have to skills to oversee the organisation that developed. Not doubting her sincerity/good intentions nor her skills in fund raising.
I also wonder if it became a bit of a "cult of personality", which meant that people were less inclined to ask difficult questions, as it was seen as questioning CB. When anyone did ask questions they have been attacked (and in some cases pretty viciously), which I thought was a bit fishy.
Apparently, the charities own financial directors advised they needed to stop running their finances in a "hand to mouth" manner and had to build up financial reserves (several £million's) but KC did not do so. Alan Yentob has been quoted (months ago) as having said it was "probably a mistake" not to have done this as advised- yet no moves had been made to work towards this position.
Concerns have also been raised with regards to use of funds from donors. Under charity law money given for specific projects can only be used for the intentions for which it was donated and not diverted elsewhere. The R4 programme read emails that suggested that this was not happening with some donations, and KC employees were then scrabbling around trying to justify how they had spent the money when asked to account for how it had been used.
I also understand there is some doubt over the effectiveness of certain aspects of KC's work, I don't have any particular knowledge in this field so I can't comment on whether these were well-founded or not. Combined with allegations of not reporting abuse, mishandling complaints and giving money to young people in the knowledge they might use them for drugs and so on, I think their reputation was getting a bit of a battering.
I think if you combine all of these concerns you can understand why there was some unease about giving more public funds to KC. Once these concerns became public, other donors stopped giving so much and because the organisation had not built up any financial reserves it was unable to weather the storm. I think it is a bit much for CB to claim there was no financial mismanagement at all, I think it is clear that all was not run as well as it ought to be.
That said, it's a real shame for those who relied on them and I hope other charities and council services can pick up the slack. May be wishful thinking though.