I understand your point and I’m agree but I think that’s not a limitation because the multiplier could be enabled only on specific actions and not for every of them, like solutions and similar ones (but not likes or posts).
So contributions of experienced users should represent the real knowledge of the users when giving points. Equallity is different to fair, we are not building comunism but trying to motivate more to TL3.
You can see the ratio here, that’s not bad but I see there is a lot to improve in real engagement on Discourse communities and Gamification could be a major player in that mission 
TL;DR = the multiplier should be enabled on specific actions like solutions in order to mantain the status quo (fair point mentioned by @4shapes)
Meanwhile, everyone can reach TL1, TL2 and TL3 and enjoy the multiplier.