The thing you need to bear in mind about dealing with narcissists is that they have to destroy themselves.It's one big circle of fraud and fantasy propping each other up, with them all at constant risk of being ejected from the circle the moment they start to crumble
That's exactly what it is. If the RF would just pick the right Jenga block the whole lot would fall down.
What don't they? I can only think it suits them not to. It would be easy enough with the money, power and influence they have.
With the Harkles, any interference would feed into their victimhood & claims of racism.
Some people think that KC and/or the RF are enabling the Harkles but imo they are simply not stopping them. They avoid Harold when he visits the UK and did not block the trip to Nigeria but let Nigeria know that it is a private visit.
They won't pull the Jenga block. When everything crumbles, which it will do, there needs to be no-one for Harold & Rachel to blame but themselves or each other.