Last night I was thinking about "credits" (money) in Deadlock1

So...some people leave the Earth to colonize an alien planet, but just before landing they discover that other alien races will fight for that planet.
They have land, they have build some basic structure, they start to fight to survive......and they start to pay tax!!!
With wich money?? Before leaving the Earth someone say "Hei, remember to bring all your money because you have to pay taxes!"

Because I'm not aware of people get paid on Gallius IV,
You pay credits only to build stuff, so the settlers get paid only when you build something new?

Another thing, from your first very game turn you make money with "trading" Trading with whom??? And also.....trading what???

I guess "credits" they do not make much sense.