New Delhi, July 14 -- MADRID - She did not apply to become a political argument. But when Pilar Cancela, Spain's Secretary of State for Migration, stepped to a lectern at the end of June to announce that 1,174,978 people had formally sought legal status in less than three months, the unnamed cleaning workers, hotel maids, construction laborers, and care aides behind that number became the center of a debate Spain has been quietly avoiding for years.

it reveals the true scale of undocumented labor quietly sustaining Spanish households and worksites while remaining, until now, largely invisible to official ledgers.

Of those 1.17 million who applied, 609,737 have been admitted for processing, according to Al Jazeera, citing figures release...