As I've said before, when it comes to a fit and proper persons test: Quis custodiet ipsos custodes?
I always felt that had the potential for a sketch in the Life of Brian.
Two Roman guards, standing in the middle of nowhere (desert). One says to the other.
'So, what you doing here?'
'On guard duty.'
'What are you guarding?'
Guard looks around. 'You.'
'Well, if you're guarding me, who's guarding you?'
'You are.'
'Oh, right you are.'
That reminds me of the joke that modern planes are so sophisticated that they only need a pilot and a dog in the cockpit:
What's dog the do there for?
To make sure the pilot doesn't touch anything
What's the pilot there for?
To feed the dog.
On that note, I was on one of the first 747s to do an automatic landing at Heathrow. It was an excellent landing, one of the smoothest I've been on, and the pilot said that if we hadn't had the automatic landing system it was so foggy we'd have had either a long hold or diversion.