> Most of these agencies have some statutory responsibility to enforce law and investigate crimes under their purview. This includes enforcing court orders and arresting suspects in unknown and potentially dangerous situations. The report actually explains these things all the while sneering at the fact that these agencies need to employ investigative and enforcement personnel as part of their core mission.

In Germany, we have solved this massive waste of money and resources by having police help other agencies. We call this "Amtshilfe". So for example if the tax office wants to raid a business in order to seize records, they request appropriate police assistance.

Basically we have three different kind of police: some "border cops" (former Bundesgrenzschutz, now Bundespolizei; these care about border protection and security on train stations/airports), a massive amount of state cops caring for literally everything from the ordinary bar fight to arresting terrorists, and in some rare cities there are "city cops" (Stadtpolizei) taking care about enforcing parking tickets and other city regulations.

But individual agencies do not have their own police powers (okay, maybe except the military - they have the Feldjäger, but these have only authority over military personnel and are rarely seen outside barracks).