Yes, Prime Minister1986

[discussing a financial scandal]

Sir Desmond Glazebrook:
They've broken the rules.

Sir Humphrey:
What, you mean the insider trading regulations?

Sir Desmond Glazebrook:
No.

Sir Humphrey:
Oh. Well, that's one relief.

Sir Desmond Glazebrook:
I mean of course they've broken those, but they've broken the basic, the basic rule of the City.

Sir Humphrey:
I didn't know there were any.

Sir Desmond Glazebrook:
Just the one. If you're incompetent you have to be honest, and if you're crooked you have to be clever. See, if you're honest, then when you make a pig's breakfast of things the chaps rally round and help you out.

Sir Humphrey:
If you're crooked?

Sir Desmond Glazebrook:
Well, if you're making good profits for them, chaps don't start asking questions; they're not stupid. Well, not that stupid.

Sir Humphrey:
So the ideal is a firm which is honest and clever.

Sir Desmond Glazebrook:
Yes. Let me know if you ever come across one, won't you.