What good would that do? They are incompetent. You are comparing apples and road apples. DOD lifers tend not to work out in the private sector. They are lazy clock punchers.
The average age of first employment with the US government for civilian employees is 35. Take that any way you want.
Go to usajobs.com and you can get an idea by looking at the current job openings for different engineering disciplines. The job announcement will have the gov. org. hiring, pay et al.
Here’s a link that’ll give you a taste of it:
https://www.usajobs.gov/JobSearch/Search/GetAdvancedResults
Example: Industrial Engineer with DOD in Philadelphia working for the Defense Contract Mgmt. Agency, Pay range $ 87,292 to $ 113,478
Civil Engineer with the Coast Guard in Juneau, Alaska Pay Range $ 62,703 to $ 97.701
Chemical Engineer with the FDA in Rockville, MD. Pay range $ 89,033 to $ 115,742
Interdiscplinary Engineer with the DoD Defense Contract Management Agency in El Segundo, Ca. Pay range $ 91,141 to $ 118,481
Nuclear Engineer with the DOE in Germantown, MD Pay range $123,578 to $ 155,500
Mechanical Engineer with the Air Force material Comman in Utah Pay range $ 35,567 to $ 89,450
Interdisciplinary Engineer with the DoD Defense Contract Management Agency in Oklahoma City Pay range $ 86,489 to $ 112,432
Supervisory Civil Engineer with Air Force national Guard in Mansfield, Ohio Pay range $ 81,823 to $ 111,148
Industrial Engineer U.S. Army Acquisition Support Center in Warren, Mich. Pay range $74,794 to $ 115,621