（权利的）集中化the act or process of centralizing a system, company, country, etc. (= removing authority to one central place)
What I see is more and more centralization of power into the hands of the President. 我看到的是越来越多的权力集中到总统手中。
He protested against the centralization of government. 他反对政府的中央集权。
See: centralize