Instead they have three different professional organisations, because the UK is ridiculously class-stratified: https://en.wikipedia.org/wiki/Police_Federation_of_England_a...
> Superintendents and Chief superintendents are represented by a separate staff association, the Police Superintendents' Association of England and Wales (PSA),[3] while the most senior officers are members of the Chief Police Officers Staff Association (CPOSA).
The typical pro-union argument for companies is that they protect workers against abuses by the company.
In the public sector, the union is supposed to protect workers from the citizens? I haven't ever heard of a good theoretical argument for them. Would be interested if someone knew of one.
Public sector unions are fine.
Edit: Your downvotes only make it more obvious that you don't really have a counterpoint to the police's homicidal tendencies nor their unions' participation in crafting legal protections for their actions.