Do you just think they asked Ghul nicely to get that info?
Nope. I have an idea of how they got the information, and honestly, I couldn't care any less as to the legality of it.
And I think there's something to be said for having the country re-imburse us for the cost of liberating them from a homicidal dictator.
In the case of Afghanistan, we invaded a country without a declaration of war, despite the fact that, using a little known(at least in the US south) thing called diplomacy, the Taliban would likely have handed Osama over in exchange for the evidence against him.
In the case of Iraq, you invaded a country without a declaration of war, without evidence, and without any regard for the people of that nation.
In both cases, the idea of making those countries re-imburse you, strikes me as being nearly as dumb as the reparations that Germany was forced to pay at the end of WWI(which, by the way, created an atmosphere that was perfect for a hostile dictator to take over, and would likely cause the same thing now) for a war they didn't even start.
I'm betting you've never opened a history book in your life. You're supposed to learn from the mistakes of the past, not repeat them.