It would be a rude awakening.
All the have-nots would continue to have not, but their position would be the least changed.
All the have-everythings would have nothing and their lot would be the most changed.
The majority, somewhere in-between, would find themselves thrust into an entirely new world in an instant, where what counted and what mattered, no longer did so. The entire class of management, administrators, politicians, I.T., service sector (yes, and HR and estate agents) would be skill-less and clueless and face imminent starvation unless they ate each other.
Those who would most likely to do better than most would be those with hands on skills in the tactile professions. Farmers, mechanics, plumbers window-cleaners (no, just kidding about window cleaners). And of course military types and ruthless unprincipled thugs. You have the template. You have little time to prepare. Yes, become a camo-wearing pig farmer with attitude and you'll never go hungry.