And yet, that is the chart that keeps popping up - whether it’s the Navy version, or the USPHS version, or any other version. I suspect that if the government felt the need to update it, that they would do so. And yet they do not.
People generally understand that Civil Service grades are not equivalent to military pay grades. And people also understand that most CS slots are specialised, and that the Civil Service is not as operationally hierarchical as the military.
And even in the military, a significant proportion of the officer corps are not line officers, and do not carry the level of supervisory load that the line officers do.
An O-5 medical officer doesn’t generally command a battalion. An O-6 attorney doesn’t generally command a regiment. There are scads of O-4/5/6 scientists, specialists, physicians, nurses and the like who do not routinely exercise the same authority as the corresponding line officers.
I agree heartily that if you are talking about military supervisory issues, then yes, the chart does not describe that correspondence well. If you are talking about specialised, non-line-officer slots, the chart is reasonably valid.
The error is in exclusively viewing the grades only in terms of supervisory career tracks.
It’s one thing to be a company or battalion level officer at O-4 or O-5, commanding as a line officer, versus being a medical officer or scientist at O-4/O-5.
The general civil service schedule ranges from GS-1 to GS-15 - GS-13 through GS-15 are considered to be somewhat senior positions.
In my neck of the woods, “entry-level” hires start at GS-11 or below. In my area and in similar career tracks, we’re specialised science types, and that GS-13 requires at least an MS/MA degree, as well as substantial experience.
The chart equivalencies may well be inflated in terms of non-scientific or non-technical career tracks, but the the correspondance works in terms of civil service versus non-line/non-supervisory military slots, like scientific or medical.
In my contractor days, a colleague entered USPHS service at O-4, after service as a USAF physician/flight surgeon at the O-5/LTC-level.
The principle weight in GS/CS hiring is a combination of your score, based on your experience, knowledge, abilities and skills, as well as the inclination of the people to actually hire you. Prior military service may bump your score a few points, but it has nothing to with your prospects. Where it does make a difference is your retirement status - prior service does count in terms of when you can retire at full benefits.