For members at the smallest end, we are paying over four times more per head than the larger societies, and we have fixed costs too.
As for "what are we getting for our money", you can't have an effective Central Council without a suitable budget, and I don't think everyone is happy to pay for said effective council.
when I did the analysis in 2014 there was a 15:1 ratio between the highest and lowest per capita rate (£1.07 v 7p).
The paper is on my website if you want to see the rest of the analysis. Download from: http://jaharrison.me.uk/New/Articles/