The security personnel--and family--are provided for, so they cooperate in getting their customers to their vaults. Helicopter to private jet, I'm suspecting is the way to get to your New Zealand bunker.
Under normal circumstances, you can pay a security guard less than what they are guarding is worth—because the security guard would go to jail for theft!
If you take that fear factor away, why should he guard your castle, when he could just turn his gun on you, kick you out, and guard his castle?