I think most unionized jobs are a bad choice for comparison because the pay tends to be pretty hierarchal. That being said, in the private sector you have much more variation based on company prestige, ancillary group work, demonstrated competency, etc. Someone (for an extreme example) going to Harvard vs. SUNY Potsdam will command different starting salaries, the Harvard grad will command a much higher salary due to the perceived prestige and selectivity of the school. That difference may be based on the place you start (google versus the local accounting firm) but the school choice undoubtedly has a major impact on earning potential. Once you get outside of the top 25-50 schools the gap closes quickly, but going to a low tier SUNY school does not command the salary (nor the attention) that going to a top tier SUNY or Private school offers.