The most likely reason is to prevent the president from abusing its power.
Hope this helps:)
Feudalism worked easy because it was a system that worked from top to bottom. At the top you had the King which provided money for the Nobility that provided troops and protection for the king. Then the Nobility would bestow the land to his knights that would give the land to the peasants and they owned the land and farmer on it. The knights would provide military service for food that they farmed.
Answer:
The Colonists were very advanced with technnology of that era, and expected to take over the land the native americans had lived on for years. This cause many problems and wars to arise due to this mistreatment, but it was only the beginning. The Americans were ractist to the Native Americans, making them slaves in their own land, and killing them. When working in the fields, the Native Americans would contrapt dieseases which their immune systems were not used to. This caused even more American Inidans to die, creating an even larger problem.