[inscionent]

They have guns and a yearly budget of US$1.2 billion

https://en.wikipedia.org/wiki/IRS_Criminal_Investigation

[WorldMaker]

They are notorious for "always" catching their criminals, too. Local law enforcement of many stripes in multiple states tried to catch Capone, but in the end it was the Revenuers that caught Capone on tax evasion.

[Sschellbach]

For every Capone there are thousands of people you never heard of successfully evading taxes