Volcker is not exactly a tech-savvy guy. Volcker is the old-fashioned pencil and yellow pad type!
Even in the late 1980's when PC's were gaining a place in America business and mainframes were deeply embedded in all operations, Volcker made a statement on the steps of the Federal Hall on Wall Sreet (in front of the NYSE) that he didn't believe computers of any kind had improved productivity in American business.
Paul Volcker’s point is that derivatives have brought us nothing but trouble. Just because Wall Street is busy with computers concocting derivatives and credit default swaps, doesn’t mean they are doing anything useful except bringing home larger bonuses
You as a taxpayer are paying for Wall Street’s fun and games
And he was right. At that point there was no measurable gain in productivity traceable to computer usage.