anchor: In response, the Congress passed reforms in 1977 and 1983 that together were intended to assure Social Security's solvency for a 75-year period.
positive: In 1977 and 1983, Congress passed a series of reforms that were supposed to make sure that Social Security remained solvent for at least 75 years.
negative: In 1976, Congress passed a bunch of reforms that would leave Social Security at the mercy of the current administration.