"A raft of other professional associations"

Education reporter Karen Ayres has a telling paragraph in the Dallas Morning News about a pro-voucher rally:

The Texas Federation of Teachers and a raft of other professional associations built around public schools argue that a voucher program would hurt them, their schools and their students, and could become the first step in a larger plan to privatize public education.

Who is paying the bills for that "raft of other professional associations built around public schools" to get out there and lobby against the voucher program?

Parents and taxpayers at the rally, there to show support for vouchers, are partially footing the bill for these lobbyists.

They should not have to foot the bill for lobbyists to argue against a position they believe in.