I don't think the council providing extra services has lead to the rise of Sovereign citizens at all.One of the problems (in my view) is the Council's expansion into lots of nice to haves. So they've become fairly crap at everything they do
Just give us water, rubbish collection, clean parks, maintained roads and good libraries. Do all those things excellently and you have low rates and an effective council
The libraries are a bit of a luxury but I'm happy for us to splurge on them.
Providing Eden Park free of charge to an (essentially) bankrupt operator that can't optimise it should be out of scope for a council. Sell the land to a developer, buy some land in the waterfront and lease it to an operator that can get it working. Iwi, for example, do precisely that at Spark Arena and take a clip on ticket sales. Win/win for all involved
Similar issues in education and a lot of other things. Find out what they outright must do's are and be uncomprimising about delivering them
Interesting nobody has mentioned the influence of the insidious side of the internet and social media in the role of the Sovereign movement or similar
Surely it's actually likely the biggest cause with what's playing out in that movement
A sector of society being manipulated by misinformation & then amplifying and feeling important for the first time.