Rule consequentialism is what a call a multi-threaded moral theory—a blend of deontology and consequentialism if you will. I advocate multi-threaded theories. The idea that there is a correct single-threaded theory of morality seems implausible. Moral rules to me are a subset of modal rules for survival-focused agents.
To work out if something is right run a bunch of ‘algorithms’ (in parallel threads if you like) not just one. (No commitment made to Turing computability of said ‘algorithms’ though...)
So...
#assume virtue ethics
If I do X what virtues does this display/exhibit?
#assume categorical imperative
If everyone does X how would I value the world then?
#assume principle of utility
Will X increase the greatest happiness for the greatest number?
#assume golden rule
If X were done to me instead of my doing X would I accept this?
#emotions
If I do X will this trigger any emotional reaction (disgust, guilt, shame, embarrassment, joy, ecstasy, triumph etc)
#laws
Is there is law or sanction if I do X?
#precedent
Have I done X before, how did that go?
#relationships
If I do X what impact will that have on relationships I have?
#motives goal
Do I want to do X?
#interest welfare prudence
Is X in my interest? Safe? Dangerous etc
#value
Does X have value? To me, to others etc
Sometimes one or two reasons will provide a slam dunk decision. It’s illegal and I don’t want to do it anyway. Othertimes, the call is harder.
Personally, I find a range of considerations more persuasive than one. I am personally inclined to sentimentalism at the meta-ethical tier and particularism at the normative and applied ethical tiers.
Of course, strictly speaking particularism implies that normative ethical theories are false over-generalizations and that a theory of reasons rests on a theory of values. Values are fundamentally emotive. No amount of post hoc moral rationalization will change that.
Seriously, how much effort goes into voting? Perhaps an hour at the most?
Compared to how much tax gets taken off you every day it seems that having some minor influence in guiding the assembly that sets the budget for the spending of said tax is worth your while. If only to sack a representative assembly that displeases you.
What virtues are displayed by not voting? Sloth? Indifference?
If no one voted how would democratic government work?
Does voting increase utility? In a single case not by much but in the aggregate the people can remove a government that displeases them. This is surely better than the alternative (shoot them out as in Syria today).
The fact that Super PACs pay money to persuade people to vote speaks to the value of your vote not its worthlessness.
I think there are reasonable grounds for making the modest effort required to vote.