Believe it or not, smaller fraudsters get prosecuted all the time, too. One of the news reporters I followed on Twitter in my area liked to follow all of the small cases of real estate and business fraud in my area. There were a lot of prosecutions for people who were stealing <$10K at a time through affinity fraud and fake business investments.

You just don't hear about them as much because someone going to jail for stealing $60K from a couple families from their church in a fake real estate scheme isn't as exciting as a massive fraud against JP Morgan.