Basically the FAA is a far cheaper system, for various reasons.
for the cost of a JAA ATPL Intergrates, you could get a FAA ATP and a heap of hours.
if it was simply a case have a FAA, heres a JAA, everbody would do it, so the JAA simply ban compitition.
Unfair, but also protecting EU interests. I can understand this, but now were locked in with all the JAA S*it with viable competion to make them buck-up their ideas.