When a public sector union negotiates higher wages and benefits, that requires more money from taxpayers or less spending on other government services.
Teachers unions negotiate on such hotly debated public issues as tenure and merit pay. Some teachers disagree with the union position on those issues.
As Justice Anthony Kennedy said in oral arguments on Monday, “the union basically is making those teachers compelled riders for issues on which they strongly disagree.”
Those teachers being ones who object to paying so-called fair share of union expenses, including bargaining expenses.
For more, read this: The teacher who went to the Supreme Court – Chicago Tribune