Middle class is going away for sure. It has always been a historical abnormality anyway. As for the latter -- people have been participating in monetary econom

Middle class is going away for sure. It has always been a historical abnormality anyway. As for the latter -- people have been participating in monetary economy long before industrial revolution, and will be participating whichever way the society evolves -- it is just simply more convenient than barter. If someone can produce beer himself cheaper than it is available on the market, why would he not sell it and earn some money? And if he cannot make it cheaper, why would he not buy it instead (or not drink it at all if he is too poor, or steal money & buy beer, or...) -- the point is that whatever he does, making it himself is never a good idea unless he enjoys it as a (somewhat expensive) hobby.