This. I tend to cringe at these megachurches that collect (metric) tons of money from poor people with the (false) promise of "health, wealth, and prosperity" - only to turn-around and spend hundreds of thousands, or even millions, to buy a fancy plane, property for a bigger parking-lot (I've personally seen that same church humiliate a poor, homeless person - by putting a suit jacket on them for service, then refuse to provide any kind of real material help.
The bible's position on it is pretty simple, "Render unto Caesar the things that are Caesar's..." - "USA" is printed on the dollar, churches ought to pay taxes. Even money that falls out of the sky counts as income.
This seems to be a recurring theme with people who have no understanding of taxes and corporations. Removing the tax exempt status from most churches wouldn't change anything - at least not at the federal level.
Churches aren't people. If you buy a car, you buy it with money that's already taxed. Same with your house, clothing, food, etc. You get to deduct charitable donations.
But corporations only pay taxes on profits, which are [generally speaking] what's left over after the expenses are paid. That means the plane, big building, parking lot, etc. gets paid for before taxes. Same with salaries. They would likely have no problem getting by with little or no taxes. Actually, it would probably end up like the corporate world where the biggest players pay little or nothing and the small guy gets screwed because he can't afford as good of an accountant.
I see this from the left quite often. I get stuff in my email every couple of weeks about how we need to revoke the NFL's tax exempt status. The NFL lost a couple hundred million last year - think they care about taxes? If they weren't tax exempt they'd be getting a substantial refund (and I'd likely be getting emails about *that*).