The gap between the upper-middle (professional-managerial) class and the lower-middle (working) class is growing. The managerial class is moving toward a tighter relationship with the ruling class (the techno-oligarch/new clerisy alliance ) and the working class is sinking into the ranks of the lower proletariat and lumpenproletariat.
Krystal Ball and Rachel Bovard discuss a study on the most kind of damaging wealth inequality on upper middle and lower middle class.
