MIGUEL LOBIANCO and JUAN BUSTAMANTE IN a run-down part of Manzanares, on the outskirts of Buenos Aires, the scars of poverty are clear. People cook with firewood. Some have no electricity, gas or running water. Children play barefoot with old toys next to rudimentary homes. It is a stark reflection of a wider issue gripping Argentina, which a century ago was once of the richest countries in the world. By the end of last year, the poverty level was at 42%, up from 35.5% a year earlier, rising amid the impact of the coronavirus pandemic and three years of recession.…