He is also the father of Pablo Moyano, the leader of the drivers’ union. The protesters demanded a reduction in federal taxes for workers to compensate for an inflation rate private economists estimate to be 25 percent. With its main arteries blockaded by demonstrators, Buenos Aires had the air of a holiday, with parts of the public transit system shut down, above, businesses closed and normally bustling avenues all but empty. Mrs. Kirchner was re-elected last year, but her support has plummeted as the economy has slowed. Appearing on television on Tuesday night, she called the strike “extortion.”