Meh, go to another realm or figure out how to balance the income.
It's hard to do this realistically.
For example, considering the time it takes to move from one realm to another, you cannot "flee the tax collector", unless you pledge allegiance to the realm next door.
I would imagine Liberian tax collectors have a hard time to reach Ruins of Walfurgisnacht, but apparently they do so easily.
It would be nice if there
some way to hide from the tax collectors. It doesn't have to be easy.