 During the 1960s, the wealthy classes of Francoist Spain experienced further increases in wealth, particularly those who remained politically faithful, while a burgeoning middle class became visible as the "economic miracle" progressed.International firms established factories in Spain where salaries were low, company taxes very low, strikes forbidden and workers' health or state protections almost unheard of.State-owned firms like the car manufacturer SEAT, truck builder Pegaso and oil refiner INH, massively expanded production.