"Show me just what Mohammed brought that was new, and there you will find things only evil and inhuman, such as his command to spread by the sword the faith he preached." -Manuel II Paleologus
"As I said, a life basket of essential goods and services could be exempt from the tax altogether."
Then they need to go back to the drawing board and do that.
Until that happens it would never pass and its impossible to figure a rate that could work.