Earlier quoted context omitted.
Can you prove it? I don't think I've ever met an engineer who is, by themselves, 1000x more productive than even the least productive person I've ever worked with.
You can easily make a claim that Google is a $1.4T firm vs may be a $40 Billion Twitter-like also ran if it weren't for this https://www.newyorker.com/magazine/2018/12/10/the-friendship...
Also, of course, if you compare me (L5 Swe) and Jeff (L11 senior Google fellow/SVP) or Sanjay, you'll find that the roles we are hired into have vastly different compensation ranges. So even presuming this is true, it actually goes against your overall point that wide ranges for a single posting are justified. I'm not being hired for the same work as Sanjay.