Back to the basics of this topic, question being, "Is it better to walk in off civvy street to become an officer, or is it better to wear the commission with some pre-requisite time in the ranks?"
As a recently minted 2Lt in the RegF with over 6 years experience as a CPL with an operational tour from in the Reserves, there are valid arguments for both sides.
During my military experience, I've been fortunate enough to work for some very intelligent, capable, and motivated officers who would always show signs that they were genuinely concerned for the welfare of their troops. I've also had the unfortunate experience of working for some of the most incapable officers who didn't give a dung about the troops under their command, and were more concerned with putting the very minimum into the position they held until they could sleaze their way into the next higher position.
I've seen both these brands of officer come from both direct entry, as well as coming from the ranks. So it's safe to say that not one entry program is better than the other at producing quality officers in the end, but I will discuss what I think an officer brings to the table from either perspective-- experience or not.
COMMISSION FROM THE RANKS:
Pros:
We can all agree that a new officer shows up at the unit with a bunch of theory crammed into their heads, but very little practical experience to back it up. Well, if an officer came from the ranks, especially the same trade he/she used to work in, the "ol' noodle" is going to be able to put 1 and 2 together, and understand what it truly takes to put a project/mission together; not just what it looks like on paper.
The officer with experience as an NCM/NCO is more apt to take better 'care' of his/her troops, because they've had the opportunity to see and experience the welfare consequences of an officer that didn't take good care of the troops. When I was on the receiving end of mistreatment, I always promised myself that one day if I was in the officer's shoes, I wouldn't do things like 'this or that' that needlessly jerked around the troops. I'm not going to go in detail here, because every trade experiences different things, but those of you that are in or come from the ranks, you know what I'm talking about.
Cons:
As far as trade knowledge and the combined experience goes, I have only this to say regarding officers that come from the ranks (mainly for those that stick to the same trade that they were when they were from the enlisted side of the house). An officer is supposed to be able to give orders, and trust that the NCO's will do the job to the officer's satisfaction. If there is a minor, unforeseen problem along the way, the NCO should be able to adapt and overcome using their own judgement and experience, as long as it stays within the intent and guidelines of the officer issuing orders. Because of our experience in the subject matter, we're more likely to be overcontrolling or micromanaging of taskings/missions because we think that we're also suited to solve these problems too, when really we should be stepping back and letting the NCO do their job. The officer that is 'always getting in the way' appears not to trust the NCO's that work under the officer's command, even though he/she is only trying to 'help'.
Next point being that an Officer who comes from the ranks may be prone to putting the men first all to often, when the mission must take precedence. If the officer always thinks of a task at hand from a troop's perspective, then plans are often formulated based on what's best or most convenient for the troops, and not necessarily the mission. Coddling your troops does good for no one in the long run, especially the task at hand.
I would like to remind the readership that I think a good/aware officer coming from the ranks will be able to excel these Pro's, and minimize the CON effects.
DIRECT ENTRY
Pros:
A newly minted officer who has little experience is more apt to work closely with his NCO's. At the end of the day, the officer still calls the shots, but if he/she is good, they'll take into consideration what their NCO's tell them, as opposed to attacking the problem in their own way without any consideration from others.
A direct entry officer can easily separate him/herself from the people who work under them, because of the lack of connection coming from that side of the house. Military life can be hard at times, and sometimes there's no easy way to get a task done. As an officer, our loyalty must go up first before it can come back down. I don't want to say that DEO officers show more loyalty to their superiors than ex-NCO officers, but I will say that it has to be more prevalent in the DEO's mind because that is encompasses the majority of what they've been taught.
Cons:
Due to a lack of connection or perhaps experience, there's more likelyhood that direct entry officers are more apt to please their superiors at the expense of their troops. I could talk for hours on this subject, but I have a feeling that most of you know what I'm talking about, regardless of your trade.
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All in all, I think that an officer who spent time in the ranks makes a far better officer, especially in the first few years after commissioning. Some of the best coffee break jokes are often at the expense of junior officers, so a little bit of experience and knowledge will go a long way at earning the confidence and respect of your troops. Of course, not every rule applies to everyone; there's always some very valid exceptions. My approach has been mainly from the Army end of things, so I would expect some variance between different elements. Perhaps someone with a different perspective can shed light.