Londoners, how much do you earn and how many YOE

Was discussing in my friend group that I went to uni with, we all have around 6 YOE. The pay varies drastically with the lowest on 50k and the highest on 170k. I’m baffled because we all started at the same place and have now ended up living very different lives.

So my question is, TC and YOE

(Asking Londoners because HCOL)