How did church officials such as bishops becom involved in feudalism?

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Catholic AnswerFor a more complete discussion of this issue, please see the Catholic Encyclopedia article at the link below. Feudalism was not a monolithic thing, it was a social system that evolved from barbarian usage and Roman law. Moreover it went on for several centuries, and was certainly not stagnant, but ever evolving. As it was the social system that dominated Europe for nearly seven centuries in many different countries it was a very different thing. The Church, concerned with people's spiritual welfare is very much a guest in whatever culture she finds herself. Problems did arise when kings and monarchies gave land and titles to the Church in return for favors, and younger sons, with no hope of a title or land looked to the Church to fill their future in the temporal world, not the spiritual. The Church is in the world, and the people in the Church are from the world, there is much intermingling, and individuals, never free from sin, tend to take their problems with them into the Church. Feudalism or modern day democracy, it is no different, we are in the world, and the world, and the people in it, have problems. Only the saints are free of such worries, and far too few of us become saints in this world.