Hi!
I think tax does not work as intended. The hint on taxpayers say that all working citizen eat 63 fruits and grain and they pay 0.6 for each.
I produce 8 grains and 7 fruits but the gold income is 2/s from grain and it should be 8*0.6 => 4.8 and similar for fruits.
If I increase tax then the tooltip will say that the amount they pay for each food is increased but the gold income stays the same.
The only thing tax is doing for me is that it increases the amount of food the villagers will eat (obviously it is much more than what I can produce).