I would say the OP isn't -quite- right when they say everyone makes the same flat rate on automated income on a weekly basis. In theory that's sort of right, but actually in practice that's not true.
And while it would be nice to be able to bump up weekly earnings as a CHA/INT based character, I personally think any focus on this sort of thing should more involve finding ways to increase the ability of CHA/INT PCs to use *other* PCs to exploit the NPC economy, rather than just giving them more chyen for doing what is effectively solo-grind stuff.
Particularly in the Mix, I think CHA/INT PCs are at a massive disadvantage compared to Combat PCs (at least at the lowbie-midbie stages) when it comes to utilising other PCs to make chyen using the automated systems, simply because of well, most of you probably understand why, and I should probably avoid any details here.
To quote Ephemeralis:
"This is an excellent idea and we should do this. Make fixers the font of greater automated income and make all the dumb, ugly brutes work through them to get a piece of their pie, as it should be."
This I agree with, and it should involve interactions with other PCs, not just directly with automated systems, in my opinion. How can it be done? I'm not really sure.
There's rules in place to limit the disparity between fixers and face-punchers in this regard, but currently the PC-PC-NPC economy still leaves the average lowbie fixer working extremely hard for loose change compared to what a lowbie combat char can earn in a matter of moments.
Maybe I'm just being a complete blank, but that's how I see things at the moment.