The core premise is false. The world is becoming less unequal, not more. Technology is assisting that. That trend has been - aggressively - ongoing for decades. The world is the most equal it has been in recorded history, almost entirely thanks to the rapid spread of technology that began in the developed world and was quickly adopted down the chain economically. The Gates Foundation expends a fair bit of effort every year trying to correct this line of ignorance, it appears to not be making a dent in the problem.
