It also coincided with the US propagating violent dictatorships and committing unparalleled war crimes abroad. The Korean War, Vietnam War, Indonesian Mass Killings, rise of the House of Saud, Shah in Iran, and incredible meddling and history of coups/death squads in Latin America.
That middle class wasn’t made by just engaging in good business, unless you consider the violence of imperialism good business… In which case absolutely go fuck yourself… But only if you stand by all that foreign aggression and murder and downstream oppression.