WHAT WOULD IT TAKE TO GET THE GOVERNMENT TO REVOKE THEIR TAX EXEMPT STATUS? Public pressure? Media blitz exposing their finances. Political pressure? What?
The separation of church and state would prevent that. The US supreme courts formal neutrality test would not allow for tax exemption on churches to be lifted. I think the argument should not be one of losing tax exemption, but the argument should be for full public disclosure regarding financial matters for all churches. That is still a neutral stance and the only thing the state would be doing is leveling the playing field for its citizenry by giving access to information.