Keep in mind that measuring dishonesty would happen in a continuum. As I, and then mspart alluded to, there will be "pockets" in all professions.
"I'm curious.... how are "money changers" dishonest."
I think that about 80 percent of what Wall Street does should be illegal. It's certainly unethical, thus philosophically unacceptable. That is my opinion. If you disagree, I will not convince you otherwise. Wall Street should be an open market to match folks, with money to invest, with businesses looking for funds. Let's take the simple example of betting on a business to fail. Given what, in my opinion, "should be", that is a dishonest act.
"And given there is no proof there is no God how are religious teachers dishonest?"
Are you suggesting that, if God exists, there can be no dishonest religious teachers? That is what your question seems to imply.
That aside, what percent of wars have been fought on religious grounds throughout history even up to current times? How many state-sponsored or community-sponsored murders within various societies have happened, with religion as the reason? Are not most (almost all?) religions supposed to be peaceful? Seems like a high degree of dishonesty has existed in teachings.
Again I don't expect to convince anyone here. Of the original poll list I believe that two of them (prostitution and journalism) have a higher degree of honesty then many others. But there are not perfect professions by any means.