That's patently false. Feudal law required that the serfs get 33% of the produce from the fields. The economy was mostly tied to farm produce and the serfs could not be kicked out from their houses.
Where did you get that from? You are talking about millions of people scattered over hundreds of political entities over hundreds of years.
There might have been some commonalities, but certainly not anything like this rule.
The feudal laws of mostly Western Europe. Eastern serfdom has been much worse and much closer to slavery, however the serfs still had their house and share from the crops. The eastern European feudal lords, dukes, kings or emperors never had access to this much share of the wealth like ordinary billionaires today do.
Ah yes "Feudal law". Which Feudal law?
English. As mandated by the church. The rest of the feudal domains, while varied and some were much more brutal, also had the same setup in which the serfs were entitled to their share of the crop. So the point was and still is valid: Never in history a minority controlled this much of the world's wealth like the billionaires do today, including kings and emperors.