Interesting. Only the Mormons are listing as requiring it. And same with the magic underwear!<quoted text>
They already do. Its called dues. And often it is income based.
noun (Concise Encyclopedia)
Contribution of a tenth of one's income for religious purposes. The practice of tithing was established in the Hebrew scriptures and was adopted by the Western Christian church. It was enjoined by ecclesiastical law from the 6th century and enforced in Europe by secular law from the 8th century. After the Reformation, tithes continued to be imposed for the benefit of both the Protestant and Roman Catholic churches. Tithes were eventually repealed in France (1789), Ireland (1871), Italy (1887), and England (1936). In Germany support for churches is collected through the personal income tax and distributed according to the individual's religious affiliation. Tithing was never part of U.S. law, but members of certain churches (e.g., the Mormons) are required to tithe, and members of other churches may tithe voluntarily. Tithing was never accepted by the Eastern Orthodox churches.