Answer:
The widening of prosperity to all classes of US society was the goal of his "Great Society", a series of social programs to fight poverty and improve the economy.
(Quote from LBJ statement)
"The task of economic policy is to create a prosperous America. The unfinished task of prosperous Americans is to build a Great Society. Our accomplishments have been many; these tasks remain unfinished:
to achieve full employment without inflation;
to restore external equilibrium and defend the dollar;
to enhance the efficiency and flexibility of our private and public economies;
to widen the benefits of prosperity;
to improve the quality of American life."