Originally Posted by Eastbay1K
The gov't probably doesn't even give the airlines the opportunity to pay more for an expedited line for its premium pax. Other than LHR (and maybe other UK airports), I can't recall any other place I've been with a fast-track immigration line for premium cabins. And these (AFAIK) are paid after the fact, by the number of pink cards collected by the line warden.
BKK certainly offers VIP immigration for F pax of most airlines. A personal assistant will meet you at the aircraft door, take you and your carry-on luggage through VIP immigration, collect your checked luggage at the belt and lead you to the exit to meet the driver of your limousine (courtesy of TG) to the city.