The third circle of workers, including those with insecure jobs, benefit from low grade labour law (Ballester, 2006). We heard how, in Spain, following several reforms of worker status that resulted in the existence of a double labour market, special fixed-term contracts were introduced in 1997 to reduce job insecurity. Finally, the fourth and last circle, farthest from the protected core, consists of non-existent work, the invisible work of illegal workers, who may be local or foreign, ghostly participants in the underground economy, who sometimes alternate illegal and legal jobs, as well as illegal immigrant workers.