I have tax set to 25% the peasants say nothing. If I change the tax to something like 10% the peasants will complain about high taxes for that turn only and then say nothing. If I crank it back up to 25% they say nothing.
That observation was with a capital city though I have also set a rural near my capital to 25% with no consequences. I'll see if I can get a further out region and crank the taxes up.
