I am in a HCOL area on the locality chart :/ We get hired in at $70k and this seems rather common among my peers + contractors, so I don't exactly know how some

I am in a HCOL area on the locality chart :/ We get hired in at $70k and this seems rather common among my peers + contractors, so I don't exactly know how someone is getting $100k at the door. People who have been here ~5+ years are GS13 or equivalent. However, most of us aren't and I don't see any upward trends, as our GS14/+ slots are being slowly retired/transferred away. There seems to be a large age gap between the newer engineers and the older ones. Sounds silly, I know. I am wondering if most of us are going to wander off then come back for retirement? Or is the program doomed in the long run? Thanks. I think I just needed to see it from someone outside of my program.