Alright, I am currently overworking the system right now.
Loogas and several others had some good ideas and I missed the point of "incoming goods" and "outgoing goods".
I will change it for only outgoing rheinland goods, since this makes the most sense.
Also the Classes gets a rework into several categories.
Basic, Industrial, Military and others.
And browsing the whole 9 Pages, gave me a pretty impression, that some few people just read "tax" and "rheinland".
Open the real list, have a look on it.
Synth foods will suddenly realize that they DONT have to pay taxes.
Unless you trade Engine Components......most unlikely, is it?
Food and even Synth Paste is basic stuff, and tax free.
And it will stay like this. The basic stuff is tax free, only the industrial and above will recieve a tax. Outgoing from now on.