Adam Smith (writer of The Wealth of Nations, you might have heard of it) pointed out that forcing individuals to perform mundane and repetitious tasks would lead to an ignorant, dissatisfied work force. For this reason he advanced the revolutionary belief that governments had an obligation to provide education to workers.
I think that when you get payed $7.25 an hour you have to work so many hours that there's no way you have spare time to educate yourself to get out of that situation.
Amazon is an example of capitalism gone a tad bit too far. The market is only self correcting to a certain point.
It's great that Amazon (not only Bezos, but all the stakeholders that agreed with this step) is acknowledging that people deserve a decent pay.