I know about the Old Testament use of tithes - however, we were talking about how the LDS church uses its tithes: They are not used to support bishops and elders.
Who, other than the church, has the right to answer the question of who they designate as their clergy? If the Mormon church considers them clergy, then I accept that they are LDS clergy.
The law defines what a clergy is, they can call the ‘bishops” fish for all I care.