I have to disagree. The elephant in the living room is mainline denominations are not Biblically literate, and the ones you credit with owning their own property are. The mainliners gave up sold out "good" for "nice" along time ago.
In my opinion the two go hand in hand. I believe the first wave of this campaign was to "dumb down" the mainline churches in their approach to the Bible. The Methodist church of today is not the one of John Wesley, nor even the one of 50 years ago.
Once they had the people less literate in the Bible, they could incrimentally bring in people who accepted this kind of activity. Once a sizeable number had infiltrated the hierarchy, they made this move to force the rest out in order to control the power and financial wealth, because most people who are left, even if a bit shaky on the Bible, know that this is WRONG.