Shortage of workers because most had died by the plague, so the peasants got more rights, and most of them moved to cities because they felt like they don belong to the lord.
Tax Arm and a leg
These taxes need to stop their expensive.
Peasants were forced to fight and to pay higher and more frequent taxes. Those who survived the war were needed as soldiers and workers. For this reason, the common people emerged from the conflict with greater influence and power.