The problem is that a merge increases the centralization of power and the ability to abuse that power with impunity. ICE was only formed 16 years ago as this so

The problem is that a merge increases the centralization of power and the ability to abuse that power with impunity. ICE was only formed 16 years ago as this sort of centralized organization. That is different than going via multiple separate entities, each of which have their own checks and balances, oversight and even internal politics that make it less likely widespread abuse would pass all the links in the chain untamed. That is gone. The difference in 'effectiveness' is sort of like the difference between the reach of the LAPD intelligence arm vs the CIA.