Why don't attorneys help get IRS personnel prosecuted?

I just read an article that's a few years old, by someone I follow on Twitter, with the same title as this article. It fits in nicely with the topic of this blog, so I thought I'd link to it and quote a few sentences below.

Do you recognize this phrase: “…ordinary people can understand what conduct is prohibited and in a manner that does not encourage arbitrary and discriminatory enforcement.“? If we must wait until we are in front of a judge to find out whether our conduct is conformed to the law, what is that telling us about the Code? If on a whim, an IRS agent can disallow our deductions 4-7 years after the fact resulting in a bunch of penalties and interest, what is that telling us about the Code? ...
What does the fact that there is a 50/50 chance of prevailing which depends upon who is sitting in the Court at the time your petition for cert arrives tell us about the Code, IRS, and the judiciary?