why ask the question if you already know the answer?
you asked why they don't open here, yet when you are told that they are here in the form of toyota (if they ever decide to sell the lexus brand here), you fire back by saying that they are owned by the same company but are not part of each other. makes very little sense to me since the prado, cruiser, celsior, soarer, harrier etc are also sold under the lexus badge with minor cosmetic changes.
toyota pakistan is content with making fools over it's customers with their current offerings since the investment they have made so far is paying off exponentially. i highyly doubt they'd like to invest another penny in pakistan if they had it their way.
the only way to make them sell us what we want is to stop buying their current garbage,.. but sadly as long a toyota offers a corolla, our moronic people will keep buying them (same with almost all other the other local junk).