Of course some clergy are the "ceo" of the local congregation, and if the local congregation is quite large, with lots of community functions and activities that must be overseen, then the job becomes harder and harder, and centered around management and business. If the reason a church is raking in the bucks is due to the preacher, and that is what the preacher has demanded, then good for them.
I've heard that argument, and it does make a certain degree of sense to me... but only for churches that don't require tithing.
A freewill offering to a church belongs to the church to do whatever it wants, because it was the parishioner's voluntary choice to give it to them.
The only thing that gives any remotely legitimate color to the idea of a tithe, however, is the idea that the money is consecrated to God. The church simply does not have the right to do as it wishes with it.