Looking at rebellions and revolutions in Europe (just because I know european history better than asian history), they tend to start when someone (not necessarily the poor) feel than the upper class/the king is not doing what it's supposed to be doing. It's not a cash grab, and in a lot of revolt what the rich have and don't deserve is not taken and distributed, but rather destroyed to show that it's about punishing traitors of the social contract, not robbing them.