The well-to-do Walton family from Bentonville is not enamored of religious freedom either, especially as it relates to education. Vouchers are proven failures at improving education, yet the Waltons pour money into voucher plans that benefit private schools, almost all of them religious, and threaten the existence of the public schools on which most Americans depend. Public education advocate Diane Ravitch writes: "The Walton Family Foundation spends nearly $200 million every year to undermine public education. It gives to groups that open charter schools and promote vouchers. It throws a few thou to the Bentonville Public Schools, but the big money is available only to those who want to bust unions and privatize public education."