The tower leans from its foundations, and every new story but hastens the final catastrophe. To educate men who must be condemned to poverty, is but to make them restive; to base on a state of most glaring social inequality political institutions under which men are theoretically equal, is to stand a pyramid on its apex.
Basically, George is referencing how educating those who are bound to live a life of poverty up-ends the progress that it develops. This can be seen by the disorder that the lower-class causes when they realize how mistreated they are.