Remember the only reason the renaissance occurred was due to the concentration of wealth after the black plague hit Europe. It was indiscriminate and killed both the rich and poor. After it passed those that survived either inherited money, or if you were just a working class person you could charge top dollar for labor (they didn't have enough people to go around). In this day and age where people can literally hop to the other side of a planet in less than a day the death toll would be exponentially worse. That being said we have 7.5 billion people on this planet and it's unsustainable, mother nature has a way of keeping things in balance, I just hope it doesn't come to what you propose.