How does "elite overproduction" compare to "The Theory and Practice of Oligarchal Collectivism"? (tl;dr of the latter: the high are only ever overthrown by the

How does "elite overproduction" compare to "The Theory and Practice of Oligarchal Collectivism"? (tl;dr of the latter: the high are only ever overthrown by the middle, who —no matter what their ideology may claim as to the low— merely displace, becoming the new high)