Link a single decent Monk, Ranger, Wizard or Bard build with higher reflex save vs traps (rhetorical jab there you can't). Paladins might indeed have higher, but they are poor scouts for other reasons (Slow, only effective vs certain enemies, moderate HP at best, lack of skill points to gain spot/listen, etc)
You won't be able too. You don't know much about the Barbarian class if you thought otherwise. We have a +12 to reflex saves vs traps that no other class other then Rogues can come close to (+6 trap sense +6 IUD), and in fact Rogues gain the bonus slower (Improved uncanny dodge at 8 vs 5), leaving Barbarians with the single strongest saves versus Fort/Will traps, but Rogues win vs Reflex thanks to a higher base.