They have to come out sometime, and there will be no serfs to serve them. I hope they're S.P.E.C.I.A.L
From the article:
“Families would have been prohibited from Raven Rock — as they would have been from effectively all of the Doomsday bunkers,”
So, the government employees come out after the bombs drop signing:
“Think about your hero
When you’re at Ground Zero
And crawl out through the fallout back to me”