over-centralization

noun

1. the act or fact of centralizing; fact of being centralized.
2. the concentration of administrative power in a central government, authority, etc.
3. Chiefly Sociology.
   1. a process whereby social groups and institutions become increasingly dependent on a central group or institution.
   2. concentration of control or power in a few individuals.

n.1801, especially of administrative power, originally with reference to Napoleonic France and on model of French centralisation. See centralize + -ation.