In the United States you have 300 million people who probably file, altogether, half a billion tax returns a year—corporate, individual, and so forth. The government prosecutes only a thousand people criminally.
Now, in my judgment, if you wanted to have an increased deterrent effect, I think white-collar crime is such that if people feel a greater risk of detection, that would have an increasing deterrent effect. I think a lot of people play the lottery and assume they won't get caught.