The minimum voting age was lowered to 18 years, while equal pay for women was introduced. Maternity leave was also introduced, while the government outlawed the stigma of illegitimacy. The Masters and Servants Act was abolished, and a Labour Relations and Industrial Disputes Act provided workers and their trade unions with enhanced rights. The National Housing Trust was established, providing "the means for most employed people to own their own homes," and greatly stimulated housing construction, with more than 40,000 houses built between 1974 and 1980.