Like who ? There's no brazilian-born player in the squad that won them the Asian Cup, and the vast majority of their players is born in Qatar.Depends how you define 'mercenaries' I suppose. Qatar are naturalising a bunch of Brazilian players in time for the world cup, I believe China are doing something similar.
Look at their handball team if you wanna see what a team of mercenaries looks like (11 foreigners out of a 14 player squad for the last world cup or olympics).