Unions, even "public sector" unions, are private 501-c(5) corporations. They function as a combination talent agency and employment law firm. They negotiate contracts and oversee contract compliance. I see no benefit to students, parents, real classroom teachers, or taxpayers in a policy that gives to schools operated by dues-paying members of the NEA/AFT/AFSCME cartel an exclusive position in receipt of the taxpayers' age 6-18 education subsidy. I see no benefit to teachers in a State policy that requires all teachers in a school district to engage one specific provider of contract negotiation services. One can make a decent case, on free rider considerations, for school-wide collective bargaining. The same argument does not apply to districts with multiple schools or States with multiple school districts. With teachers and employment contracts, as with curricula and students, one size does not fit all.