Former proposal of cash transfers?

In his final book Where Do We Go from Here: Chaos or Community? (1967), American civil rights leader and Nobel Peace Prize winner Martin Luther King Jr. wrote^[16]

"I am now convinced that the simplest approach will prove to be the most effective — the solution to poverty is to abolish it directly by a now widely discussed measure: the guaranteed income.
—from the chapter titled "Where We Are Going""

From Wikipedia.