How much more would you donate to your church if you didnt have to pay income taxes?

I'd like to see somebody run with this idea. A lot of churches could be converted very quickly if they had any sort of empirical evidence that people would donate more if they were free from income taxes.

A professionally done poll, done by somebody like Zogby (I know he has church goer data because I've taken his interactive polls), would self-replicate and spread very quickly amongst church leaders if the results were positive.