King specifically criticized “EXCESSIVE materialism” as an evil.
King understood that all forms of racism including racial segregation have always been driven by economic injustice. Connecting those dots, and the corporate control of gubmit dot pushed the oligarchs’ tolerance for King’s dissent over the line and the rest is history.
The ever growing income inequality and wealth inequality chasms (that have attracted attention ever since Occupy Wall Street’s (OWS) 2011 emergence emphasized inequality’s devastating affect on democracy) have been the subjects of the most recent re-emergence of Dr. King’s economic injustice alarms.
Since the dawn of the 21st century we have seen many examples of the “economic apartheid” in Murka that Dr. King warned us about, the most recent example being the support Trump and his ilk get from Murkins who have ended up on the wrong side of economic apartheid.