Having worked there, I am not sure I believe you. An SDE interview is a single phone screen before onsite. Salary is also not negotiated before an onsite + offer in hand. I was a hiring manager and often matched or exceeded competing offers from MSFT/GOOG, so our pay was not significantly different. The only difference is that Amazon base pay maxes out lower (at about 160k) and therefore RSUs make up a larger portion of salary for higher level positions.