Because they have regions in very good circumstances (eg, capital of a small realm) and believe that it's not only acceptable, but normal, for the Lord to sit in his region holding court, doing police/civil work, and surveying the administration constantly. (And consequently, they have very high bureaucracy skills.)
Then they assume that everyone can run tax rates like this, and claim that anyone who's running "only" 18% is a wimp who's obviously just wasting money, because 25% is the tax rate you're "supposed" to be running. 
Huh.
I was going to say, that since I'm not a courtier, that essentially it is impossible for me to run a tax rate that causes production to drop, because I have no way to restore it effectively. I can hold constant courts but that won't make any difference on the production.
By the way, are the only things that effect the region stats, the stuff that is listed on the daily region report? In other words, are the green, white, and red reports the only things I can adjust to make a higher tax rate easier to maintain?
