Gift Aid does worry me in that if I were for example going to make Islam illegal, my first act would be to introduce gift aid. That way after a few years every Mosque is financially dependant on the government, and you have a complete list of the names and addresses of any tax paying Muslim serious about their faith.

Given that gift aid has been around for about 10 years without a crackdown I think the party (Labour?) that introduced it were happily not thinking the same way.