@sally Nobody B has higher chances over the short term, but over the long term eventually the smoking will kill him.

Provided nobody A had previously invested part of his wage into something with value (precious metals (i.e. jewelry), a vehicle, knifes, a crossbow (can't own a firearm in the nonfree country of Korea huh?), etc) rather than blown it all on slop, he'll likely survive a economic collapse, as he'll be able to trade any of those things for food and water in the short term until those becomes available again and he won't die from smoking (although a sedentary lifestyle somewhat less lethal than smoking, having to get off his ass and walk in long queues to receive food would solve that problem).