Why did Otto make so many bishops and abbots into agents of his empire?

Question

Quizplus · Accepted Answer

By appointing bishops and abbots, Otto ensured that they could not marry and produce competing dynasties, thus securing his own family's power. This was a common practice in medieval Europe known as "lay investiture." While some of these appointees were skilled administrators, the primary reason for their appointment was to prevent challenges to Otto's rule. Taxation was not a significant source of revenue for Otto's empire. The reference to Pope Urban II is not relevant to Otto's practice of appointing bishops and abbots as agents of his empire.

Why Did Otto Make So Many Bishops and Abbots into Agents