Charles Ellicott Commentary Job 34:17

"Shall even one that hateth justice govern? And wilt thou condemn him that is righteous [and] mighty?-" — Job 34:17 (ASV)

Shall even he... . —The argument is that one who holds such a position of absolute rule cannot be other than most just. He who is fit to rule must be just, and He who is the ultimate ruler must be fit to rule, and must, therefore, be just; but if He is absolutely just, how can we condemn His government or Him on account of it, even though we cannot explain it all or reconcile it with our view of what is right?

Him that is most just, means rather him that is just and mighty, that is, not only just, but also able to execute justice because He is mighty.