This is from Vigilant Citizen. Why do they need a pyramid with two pillars? Freemasons?

The IRS headquarters in New Carrollton, Maryland is a government building that, despite being constructed with public funds, contains art referring to elite secret societies. More importantly, the art conveys a strange message about the U.S. Constitution, and the American people in general. We’ll look at the symbolic meaning of the art found in front of the IRS headquarters in Maryland.
Here is the full article with more pictures:
Sinister Sites: IRS Headquarters, Maryland - The Vigilant Citizen