This document discusses several things that employers don't tell employees about unions. It states that with a union, employers cannot change wages, benefits, or working conditions without employee agreement. It also notes that union workers do not necessarily bargain themselves out of jobs, and that companies go out of business due to poor market conditions or management rather than paying decent wages. Additionally, it explains that unions protect members from unfair disciplinary actions and firings by having neutral arbitration, not management, as the final step in grievance procedures. Finally, it asserts that most informed workers believe unions are necessary and valuable.