Liberals will not be happy until they return to the 1950's. In 1955 roughly a third of American workers were union members. The marginal tax rate for the ultra rich was 91% and taxes on corporate profits were twice as large, relative to national income. The best estimates suggest that circa 1960 the top 0.01 percent of Americans paid an effective federal tax rate of more than 70 percent, twice what they pay today.
If you had a 2-bedroom frame house on 1/8 acre with one automobile, one TV and a refrigerator you were considered upper middle class.