Toyota sells the Land Cruiser in the USA because it is actually a much larger market than you might think. Sure its nowhere near Africa or Australia but the 200 sold about 6k in its best year, it is now down to about 2500-3000 units. That is HUGE compared to some other countries that are much smaller and have much less sales.
USA sells about 10k units of the LC/LX combined, Canada sells about 500-750 LX570 per year.
Also, the profit on one LC sale is huge, think about it this way. For every one Land Cruiser sale, how many Toyota Yaris models would you have to sell to equal the $75k on the LC? You have to pay labour, buy supplies, build, ship, distribute at least 5 Yaris models to equal $75k
One thing we need to keep in mind is that the Landcruiser buyer is significantly different than an escalade buyer, in my mind at least... This is just my idea, I could be wrong on that though because I did sell cars for 7 years in Canada, just not in USA where the landcruiser is available. Sequoia buyers did look at the lx, but obviously were turned off to price.
Here's some stats for 2008 (I used this year b/c 2009 stats were not available for all models)
Sequoia sales = 16387
Escalade sales = 39710, but 23947 were regular suvs
Landcruiser sales = 3801
LX570 sales = 7915
So, lexus sells over double the landcruiser. I still don't see why Toyota sells them under the landcruiser name...? They likely make more money on it as a Lexus anyway... There was almost $7500 profit in a sequoia in Canada in 2003 for the dealer (pre-lot pac) Not trying to start a flame war... Just an opinion based on what I see in terms or sales trends. I also hope I didn't hijack the thread, lol!

ps... I still love my truck, lol!