I question whether these positions would be better paying if they were filled by government employees. In every case I can think of, government employees earn less than their private sector counterparts.
Can you name a few people positions as an example? Particularly in lifetime earnings and total comp government work in teaching, chemistry, and administrative work is 1.5x or more that of theprivate sector median with much stronger protections. In particular pensiins, health care, and early retirement make up for a lot in terms of starting hourly wage.
I think you may be right as it stands now but I don’t think this was right in 1980. When factoring in benefits, pension, working conditions, and employment stability I think even today it may not be clear who is better off.