There was a time when Republicans used to refer to themselves, proudly, as “the party of Lincoln.” But you don’t hear that line much these days. Why?

The main answer, presumably, lies in the G.O.P.’s decision, long ago, to seek votes from Southerners angered by the end of legal segregation. With the old Confederacy now the heart of the Republican base, boasting about the party’s Civil War-era legacy is no longer advisable.

But sooner or later, Republicans were bound to notice other reasons to disavow Lincoln. He was, after all, the first president to institute an income tax. And he was also the first president to issue a paper currency  the “greenback”  that wasn’t backed by gold or silver. “There is nothing more insidious that a country can do to its people than to debase its currency,” declared Representative Paul Ryan in one of two hearings Congress held on Wednesday on monetary policy. So much, then, for the Great Liberator.

Which brings me to the story of what went on in those monetary hearings.

One of the hearings was called by Representative Ron Paul, a harsh critic of the Federal Reserve, who now has an oversight role over the very institution he wants abolished in favor of a return to the gold standard. Mr. Paul’s subcommittee called three witnesses, one of whom was an odd choice: Thomas DiLorenzo, a professor at Loyola University and a senior fellow at the Ludwig von Mises Institute.