Amazon having trouble to hire I think it is a well deserved result. I hope they never hire great talent again. Lately I heard they're looking for contract hires, which seems to fit their cheapness and lack of ability to attract talent.
At some point, the turnover has to lead to "the blind leading the blind" with nobody having a clearer big picture view on the software they own. This can't be a productive way to run a company, but they seem to persist nonetheless. It may take many years, but I imagine their software will rot from within due to their hiring practices.
Exactly, Amazon practices the equivalent of a decimation of their workforce. This may even work in the initial years, but over time they'll quickly lose their best minds and the software will be unmaintainable.