We could use a relatively low amount of resources to save the worldmfor everyone or we can just invest insane amounts of resources on destroying the world and making a survival bunker for a very select few.
That is, of course, if this is real. An enormous bunker like this requires a huge amount of people to work on it, drilling, pouring concrete, installing plumbing, electricity, networks, computers... You don't build a Doomsday bunker and have bone of your employees or providers babble about it, especially if it's (as per usual) the cheapest of the cheapest providers