http://www.theatlantic.com/business...-made-in-the-usa-but-not-for-much-pay/278270/
Apple Store workers get paid more than these guys, and they employ 28,000 more people than the 2,000 Moto X assemblers.
I think there are over-romanticized notions about assembly in the USA and how it is considered "good." Imagine this: Start a factory in Africa, giving Africans an opportunity to make a better living for them and their families, sell the phone for a dirt cheap price instead of this $575 price, sell it in brick and mortar stores all over the US that employ 20,000 retail staff, and they can swap out the covers for you in store.