Public-sector workers are paid less than their private-sector counterparts—and the penalty is larger in right-to-work states: Pay penalty for public sector workers compared with private sector workers by their state's collective bargaining rights

Wages Compensation 
Fair share states (non-right-to-work) 5.2% 0.8% 
Right-to-work states 14.1%  10.4% 
View the underlying data on epi.org.