Why Spain is offering amnesty to 500,000 undocumented migrants

As countries on both sides of the Atlantic ramp up deportations of undocumented migrants, Spain’s left-wing government is preparing to give legal status to hundreds of thousands of irregular workers. Prime Minister Pedro Sanchez has championed the amnesty as a way to not only give informal workers legal protections, but to also bring more money into a social security system increasingly under stress by the country's ageing population.