all that trouble and funding, and an illiterate shop-keeper with an AK can take out a whole squad if given a chance...
Seriously, the US is way too caught up in their own image. Putting 20 thousand dollars worth of equipment on a soldier will not make him any better at his job, nor will it magically boost his effectiveness by 500%. And then there is also the fact that combat soldiers are carrying around 40 pounds worth of stuff on their backs while attempting to engage in urban combat...
edit: its probably closer to 70-75 pounds, but I'm not enough of a military nut to know for sure...