It sounds nonsense to me to blame Wikileaks for making transparency opponents make more opposed to transparency. When you point out a problem, sometimes the people who don't want this problem to be solved will take even more radical measures to make sure it is kept secret. Giving up because of this is like giving up fighting terrorism because your actions can anger terrorists and they might kill more people. Also it's not clear from the current leaks whether they would have been prevented if there was less transparency between governmental bodies.