Teachers at least can control the revenue stream fairly effectively by going out on strike next time their contract is up for renegotiation. If the schools shut down then local governments will find a way to raise the funds. Unfortunately that hurts the students but the only way to effect real change is to force the issue.
Unfortunately, striking as a public servant is a double-edged sword. Specifically, back-to-work legislature can force you back on the job, with no new contract.
