The point about there being other measures of progression besides credits is a good one, though. Trying to balance game progression as well as the galactic economy with one single resource might not be the best way to do it. As the OP mentioned the Red Baron wasn't incredibly rich, but he had the best fighter plane available at the time (arguably, but that's not the point here). Mr Branson may be rich, but I don't think he can own a fully kitted F-22.
Bad analogy is bad.
Richard branston could buy an F-22 if he wanted one, though as a man of taste im sure he would buy the better Eurofighter.
Also the red baron didn't have the best plane at the time. The SE-5 was much better, the Red Baron just used the weakness of WW1 planes to his advantage ie slow climb rate, and he sat high altitude, dived on enemies and then zoomed back up out of reach.
That said im of the trading should net you the most money crowd. Personally that's because I don't want other proffessions bringing into the Millions an hour area. This game has to last, its not to be played in 5 weeks. If you make all professions like trading, the game will get stale FAST.
Unfortunatley most of you don't know what you are asking for, you only want the biggest ships, unknowing that you will be bored out of your tree once you "complete to this level".
If they change the game they must REDUCE RARE TRADING, as normal trading is fine and without using online tools its not so easy to rake in millions. Also trading holds the most danger in game as you stand to lose your ship, your cargo also. So millions.
Other professions ie pirate, bounty hunter (which is me) are still high paid in game terms if you don't want to complete the game in weeks. I personally WOULD NOT want them to be raised to high income at all. Also because they are the lowest risk (especially now they have reduced repair costs). Every clipper can run from battle so has no risk. Also any damage is low cost. So these other professions now risk next to nothing and can choose their fights.
If they mess with the game to level all professions income per hour they also do fundamental damage to the game.
No one will trade, as why trade (arguably boring) the most dangerous profession, when you can bh or pirate at super low risk since latest patch.
The problem is most people whining and screaming I want a BATTLESHIP because gamers now seem to have an entitlement, but they don't realise they will ultimately ruin the game for those of us who see this and even themselves. (just look at all the "i have a battleship I finished the game" threads we see.
So tldr Don't make other professions millionaire professions PLEASE!!