The discussion in this thread has oft strayed from the topic of the opening post to a discussion about unfair application of dress regulations (particularly hairstyles) in the CF. Perhaps the mods should split this off.
But here I go, wading into it anyway. This is not a new discussion and in fact was probably the most common point brought up when I conducted "Diversity Training" back in the 90s. Though women in field units were relatively common by then, turbaned Sikhs weren't and braids for soldiers of aboriginal ancestry were just being authorized.
The close cropped look affected by soldiers is not new and while there was “some” basis for its adoption (and codification in regulation) as a means of preventing disease, it is not the whole story, nor was it probably the primary reason. Military fashion (including hairstyles) has usually been a conservative reflection of civilian styles, though often with a lag of a few years. I found this quote from a noted costume historian, "In the perspective of costume history, it is plain that the dress of any given period is exactly suited to the actual climate of the time."
We put people into uniforms for reasons of identification and tradition. Generally, adopting a similarly conservative hairstyle also suits that purpose. That a short hairstyle is easier to keep clean is an added benefit, one that was also evident to civilians who adopted it. It should be mentioned that standards of personal cleanliness in the past (whether military or civilian) were not at the level practised today, nor was it as easy to keep clean back then even if one wanted to.
I've tried to find some of the reference material I used back then when discussing this topic but it may have been trashed in a subsequent move.
In essence the point I would try to make was that we want male soldiers to look (and act) like (small c)conservative males, females to look like conservative females; if someone (either male or female) has valid, traditional religious or spiritual reasons why they should deviate from that norm, then we want them to look like a conservative practitioner of that religious or spiritual tradition. It has often been discussed about the religious basis for Sikhs' dress and hair; the authorization of braids for Aboriginals was based on a legitimately recognized "spiritual" (religious?) tradition of long hair. Acknowledging that the military needs more than males of white, European, Christian descent is not pandering or accommodating; it is recognizing reality.
I tried to find something on the net about the historical basis of short military hair styles that I could quote in my argument, but found nothing that particularly suited. Here, however, are a couple of things that may give some perspective.
In August 1914, I was a full Lieutenant of twenty-six. It was to take the experiences of the 1914-18 war to show me what was wrong in the Army. My battalion mobilized at Shorncliffe. The mobilization scheme provided, amongst other things, that all officers’ swords were to go to the armourers’ shop for sharpening. It was not clear to me why, since I had never used my sword except for saluting. But of course I obeyed the order and my sword was made sharp for war. The C.O. said that in war it was advisable to have short hair since it was easier to keep it clean; he had all his hair removed with the clippers by the regimental barber and looked an amazing sight; personally I had mine cut decently by a barber in Folkestone. Being totally ignorant about the war, I asked the C.O. if it was necessary to take any money with me; he said money was useless in war as everything was provided for you. I was somewhat uncertain about this and decided to take ten pounds with me in gold. Later I was to find this invaluable, and was glad I had not followed his advice about either hair or money.
That was the perspective of a young Subaltern in the Royal Warwickshire Regiment by the name of Montgomery. Wonder what became of him?
http://badgersforward.blogspot.com/2008/03/prince-harry-and-military-culture.html
Last fall I worked with a British Army Captain and we discussed this very issue. According to him a British Army officer would never have a "high and tight" or shaved head because it indicates that one cannot afford a proper haircut. He told me only a "squadie" would have such a haircut. Additionally he said the Blues and Royals have a tradition of even longer hair than the norm.
Of course extremely short hair has not always been the norm in the US Army, in fact it is a recent phenomenon.
The highlighted sentence may even be a partial explanation why soldiers of past times had such atrociously bad haircuts. It was cheaper to crop it short, (even when you had to put on a powdered wig in the fashion of the day).