Tinker Tailor Soldier Spy but horny (complementary).
Just a plain old good time. The ending aspires to be Oceans-esque with its cutaways and reveals but doesn't quite earn it because the central heist of the movie isn't for the macguffin, it's the reaffirmation of Fassbender and Blanchett's marriage.
But fuck it, the music is fun, Pierce Brosnan is fun (but the film doesn't let him be quite as mustache twirly as he wants to be), and if I was the spouse of either lead I'd be incredibly worried for my marriage.