That's because most people don't really care about those things. If you're poor and all your friends are poor you don't have greater expectations, nor is it really a problem since you can organize your society around it.
What starts revolutions is disappointed elites - like if you promise your children good jobs and then they don't get them. Another kind is "revolution of rising expectations" where they do start getting good jobs and it causes them to expect even better ones faster than they get them.
I think you'll find that all the people we see rioting (whatever side they're on) would cite economic inequality and exploitation as a source of their problem; their differences of opinion (and focuses) might be over who is getting exploited and by whom.
Well, the answer to that is obvious: people have long since started to riot, just about almost anything except economic inequality and exploitation.