Your analysis is flawed. Its much better to run through a FAANG and compare to levels.fyi. I just did for Meta and the base salary numbers are within the ranges I saw on Levels. Actual level is not outlined so its a broad range.
These numbers are set using prevailing wage calculations for a geographical area and role. There is an incentive for companies to figure out ways to get it as low as possible but I have never seen 50% myself, that is a hard stretch to pass the DOL.
These numbers are set using prevailing wage calculations for a geographical area and role. There is an incentive for companies to figure out ways to get it as low as possible but I have never seen 50% myself, that is a hard stretch to pass the DOL.