You can do this, but I suspect they might not like the cost quote of $10 trillion per year, and they 10 years of lead time it will cost you to build a worldwide

You can do this, but I suspect they might not like the cost quote of $10 trillion per year, and they 10 years of lead time it will cost you to build a worldwide network of secure underground bunkers with their own air, water, food and energy supplies, and a hardened shadow internet that duplicates the function of the existing internet.