Even if we were to establish a permanent largish base, they would be specialists only. It will always be expensive to get there and it’s always a long term stay in an expensive habitat with strict rules that someone has to pay for.

While I like the realism of The Expanse, I just don’t see the existence of a non-terrestrial lower class or even middle class: what could they possibly due to pay for any possible living costs. I do hope we’ll develop permanent bases throughout the solar system but it will be a few specialists and lots of robotics. Nothing else makes sense