Discrepancy between salaries reported here and on Glassdoor

There is such a big difference between the salaries reported here and the salaries out there in the real world? If you go to Glassdoor or talk to any of the people in the HF space nobody is making that much.

I've been in the HF space for a while. What I can tell from 1st hand experience the salaries reported here compared to real world salaries (in London) are very inflated. At best they represent some best case scenario. It's a bit like a random walk - sure @ t=T it could be at +200 but the current expected value is say 50. I've had a year or two when I did receive a 6-figure total comp of the likes reported here. This was a rare occurrence and is far from what I could claim as a regular/expected compensation.

At least this is how things look in the systematic HF space.