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For many years, those on the conservative right in the United States have invoked a nostalgia for the 1950s, and an America that never was, but has to be presumed to have existed to rationalize their sense of loss and abandonment, their fear of change, their bitter resentments and lingering contempt for the social movements of the 1960s, a time of new aspirations for women, gays, and people of color. In truth, at least in economic terms, the country of the 1950s resembled Denmark as much as the America of today. Marginal tax rates for the wealthy were 90 percent. The salaries of CEOs were, on average, just 20 times that of their mid-management employees.
Today, the base pay of those at the top is commonly 400 times that of their salaried staff, with many earning orders of magnitude more in stock options and perks. The elite one percent of Americans control $30 trillion of assets, while the bottom half have more debt than assets.

The Unraveling of America By WADE DAVIS

Would you paraphrase the red sentence, please?