In relative historical terms these wages are incredibly low when Amazon has approximately $289,138 per employee in gross revenue. If you had a similar company in 1970 this payscale would be nearly triple what is reflected with similarly situated employees starting at 1.3x revenue per employee instead of 0.55x.
This isn't a criticism of Amazon in particular but to show in general just how unbelievably low we have allowed wages to fall in the face of historically unprecedented gains in per employee productivity.