The answer is so simple we sometimes complicate it to impress ourselves...smile. It is a common sense thing, If a leader says something FOR God and it is wrong, people will follow it because he is a Pastor. Trust is put in him as a representative of God himself in His teachings, so we see the scriptures already outlined here in the word describing those requirements as a foundation for trust among men..
But it is simple..... He ministers to many. God Himself, not people will hold him accountable.For that influence.
Yet there is another point...God wants us not to judge His church. Ever say to yourself, hey I will give my tithe to this or that, because I don't think the Pastor knows what he is doing? I hope you haven't... smile, but the understanding of the spirit behind the question you can relate to right?!!
By God being the direct judge on Pastors we are taken out of the need to keep the church in order. For God says Christ is the Head of the church, dividing thoughts can destroy a church. That also protects Gods economy, 10% has worked so far... yet we need to bring it into the storehouse or church so to not fraction Gods order of economy to His church. If wrongful use of those things happen, God Himself will correct the Pastor. and leaders of the church.
Also, in the way of secular kings and leaders this is true as well.. For God is in control of all things. If we , for instance, go to war and have to kill for our country wrongly accusing a nation or enemy, are we to take the blame if we were sent by the government to do it? God says it will be the kings and leaders that are responsible for such a decision, as long as you were following the rules of engagement set by those authorities etc etc.
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Pastors have guidance from God, but God has His will in who those people will be.. that's why Pastors today need to take seriously the call to be ordained, by God. There are some Pastors that should not be Pastors. For God did not ordain them,
Some did it because their Dad was one, some felt falsely lead , or this place needed one etc etc.
.Not ordained! It is a special calling. And God gives provisions for that calling thru the Holy Spirit.
Keep in mind too that we are all called to minister as Ambassadors of Christ, to reconcile people to the faith of God. And the things we say will also be judged by God.
....As a footnote....I too am a PK, as well, Yet I like to be known as a T,O, Theological offspring, just for the record .....smile!