A good portion of the troops were still equipped with the late 60's kevlar vests that do an adequate job of preventing soldiers from dying when hit with regular rounds or most JHP ammuntion fired from old kalashnikov rifles, but an AK74 with AP bullets could easily penetrate these. sure, these plates don't cover the entire torso, but $1500 for a significant amount of protection which covers the vital organs is worth it. It would also provide soldiers and their families with more comfort. If the army will spend well over $150,000 training soldiers and paying for their education (numbers provided to me by recruiters, including $50,000 after a soldier leaves the army to continue education, or to keep if they already finished their education), why not an extra $1500 to give them and their families piece of mind? if families will buy these on their own and send them, would it not be reasonable to spend $1500 for their sake, even if it meant eliminating the parties held on holidays for soldiers relatives at bases (which are highly publicized on news networks).
If nothing else, this would give a soldier hit an 80% greater chance of living if hit with a bullet (the other 20% being the seams and unprotected areas of the torso).