According to Diogenes Ghost the rich will survive. Us peasants are screwed. How many people can actually live in a bunker for a month much less a year. There will be so much strife in that place that they will all be basket cases after the year is up.
If such a thing were to occur, the majority of the wealthy would be blindsided and damaged far worse, imho. And, with little in the way of practical skills to hold on through the upheaval and scarcity.