Age - conservative retirement-age voters are far more likely to vote than the 18-30 demo.
Networking - churches can, and do, bully-pulpit entire parishes.
So policy is far further to the right than the population median.
The penalty isn't particularly harsh ($20 first time missed a vote, $50 afterwards). I have a 40-year-old friend that's not enrolled, and as far as I'm aware, she has never been fined for it.
That's not been my experience.
Age - conservative retirement-age voters are far more likely to vote than the 18-30 demo.
Australia has mandatory voting. We have something like 98% voter turn out. You don't know what you are talking about.
Networking - churches can, and do, bully-pulpit entire parishes.
Facts not in evidence.