IME, policing of charities is poor.
There are thousands of charities who simply pass under the radar. I doubt The Times would have got involved in the paying for sex allegations, if it had not been charity workers of Oxfam.
According to Google, the Charity Commission has 420 employees. I would be surprised if many of those are actively involved in compliance activities, yet there are over 150,000 registered charities in the UK. Certainly from the limited involvement I have had with the CC, there seems to be an acceptance that charities are run properly, unless someone shows otherwise. Perhaps I am a cynical git who has seen and spoken with too many liars, but given the huge sums which pass through charities, I can't help wondering if this is not the wrong way round.