Perjury, and lying, are forms of tyranny. They are attempts to deceive, to deprive people of facts that are a prerequisite for them to do their best to manage themselves. Misleading them as to matters of fact causes them to fail to properly manage their affairs to achieve their intended ends, and generally to fail in certain ways, intended by the liar(s). This is a form, then, of causing the deceived to take action(s) that benefit the liars at the expense of the deceived, just as if they'd been coerced by threats, or beaten until they performed those acts. It is a form of nonconsensual governance, as is any tyranny.