We have run the exact same tax rates across the realm continuously since the new estate system was implemented without fault for the entire time
So, you've been holding up 100 pounds over your heads for years. And now someone has added another 100 pounds on top. Don't you think that putting the first hundred pounds down will help you hold up the second hundred until you can get rid of it?
You guys have focused so much on having the ultimate war machine that you've completely neglected everything else in the game. And now it's coming back to bite you. Everyone is giving you very good advice.
Use it, even if it means 5 or 6 of your warriors have to put down their swords for the next few weeks.