User blog comment:Monkey.D.Me/EXPENSIVE !!!/@comment-3060121-20120311024332

Remember bounties are not only based on power so its just how bad the wg wants that person caught Usopp's bounty is higher than Nami's because he burned the flag. She beat an elite CP9 member. So because CP9 doest exist and Usopp made a direct attack against the gw his bounty was higher.