I will never understand the giga-rich. They could afford to hire round-the-clock help at rates that both buy expertise and inspire loyalty. Your house staff know where the bodies are buried, maybe literally—there's no world where it makes sense to pay them less than six figures. Remember, $100,000 is 0.01% of $1,000,000,000, or about 0.003% of their estimated net worth of $37B. They could hire an extra maid at $100,000/year and not even notice the expense.
But they can afford even more than that. Splurge a little. Hire a specialist in early childhood education to tutor your kids. Get a chef who graduated from a renowned culinary school. They could afford to spend millions on salary. Why skimp? What do they think they are saving up for?