Your unrest rates are not that far from the actual ingame unrest rates
I Wonder how different yours would play, since you are nearly forcing the player to play at a higher unrest level, for money.
Ah....you see what I did there. Excellant.
Yes, I know my rates are not much different than the games, but I find the curve to be a great deal smoother in terms of risk vs reward. (ie unrest vs tax).
In addition, I've added a more diverse spead of tax options allowing for more control over your intake.
Lastly, yes, I am encouraging players to play at higher unrest levels for money.
I wasn't sure how the AI ran their rates, but I figures that everyone should be starting off at 'Normal' giving options to go either direction, depending on your objectives...
I felt it a little too extreme when SD reduced the Propaganda enchantment to only +1/essence .... so that definately had to be modded back. 
If you do decide to try it out, I would very much welcome comments on it.