And then stop paying membership fees and entering events. If those events are still running after the increase in organiser costs mind.
If I understand correctly, if you are not an AUK member, and want to do an AUK ride, you can pay 2 quid to join for the duration of the ride. With 19 quid as the cost of membership, you need to do 10 rides a year before it's cost effective to join (assuming you are only interested in Calendar events).
Increasing the price makes this balance even harder.
For context, membership of the Dutch Randonneurs association is €45 per year, you get less than 30 rides a year, no glossy magazine, no perms, no diy, no ece... Interestingly there are a number of Randonneurs.nl members who are AUK members because it gets us the DIY/PERM/ECE stuff.
J