It's not your business either. Why do you think you should dictate how much new players earn?
Mh, why would I want a new - or really,
any - player to not be discouraged from participating in an activity by means of wasting their time vs. a comparable activity that does not waste their time?
I have nooooo idea. You tell me? You can also tell me why I would crew up with my colleague who got the game more recently, instead of telling them to take a Sidewinder, do marginal damage while staying out of the heat of it and making full profit for all the immense risk of their free Rebuywinder. Or why the very same kill death ratio for a "harmless" crewmember in a "harmless" helm's ship (e.g. trader switching to PvE) is substantially more profitable than if they happen to end up in an Elite player's ship?
It's intransparent (unless that table in OP is clearly communicated in the game before joining a ship) and arbitrary paycuts for the exact same time investment and even activity. Really sensible and respectful of your player's time.
Not.
Edit: OK, OK, OK. Let's not be fatalistic. It's all good, because the players still have full agency. Ignore multicrew, play in Wings, get maximum credits while still having a bit of social PvE experience, problem solved, case closed.
That was easy.