The police union in my city, in a state that borders Canada and fought against slavery, was founded in 1915. I'm guessing they would be surprised to learn that they are a "modern invention" that was from "slave catching" (I guess they do time travel?) and "bounty hunting services". I'm not even sure how you can say something is both a "modern invention" and the "output of slave catching". There's nothing modern about them and being the "output of slave catching" makes them definitionally not "modern".
Police unions act just like every other union does: in the interests of their members.
Unions are illegal in lots of the world. Federal public sector unions weren't legal in the US until the 1960s. Did the fact that they were illegal in 1965 have any bearing on whether or not they should be allowed? Does the fact that something is illegal in the US have any bearing on whether or not Japan should allow it?
