The variance varies widely, but you're incorrect according to my salary negotiator who has hard data in hand. I was an IC6 at MAANG and 400k was only attainable by the top end of IC6+. Most people were paid around 250-300k.

There are a few rare birds (ICs) paid 500k-1.2M, but they're either core contributors to a key tech the company uses, a main person of a core FOSS project, or some sort of tech celebrity. Managers also make quite a bit more. I recall a 2nd-level manager for some big Google product making 2.7M TC.