As for ideal communities (Sangha holding on Vinaya), good householder, settle issues by voting is only one tool of seven for such, and only allowed, to be used, if sure that most would vote in accordance with the Dhamma.
Monks would be encouraged to take part in their community's businesses. Sankharas require maintaining, do not arise, exist, remain without. Yet there is all way to leave a certain Sangha, change it, if possible, or to resist even alone. All could be made rightly or wrongly as well, of course.
Speaking unaffected, of course political incorrect, tools like voting, letting the majority chose, is not wise at all, since it's nature that the majority would go after low and long term harmful. It's by the way a reason why there is no righteous Sangha present in modern, western world.
Voting for something means to approve, requires not only mental Kamma but also Kamma in speech (giving sign). Voting for something one wouldn't approve would be cheating. Voting for harmful, would be unskilful Kamma. For example if one votes for killing or stealing or war, that's ones Kamma. Approve of blameworthy, being actually not, blaming prausworthy... such leads downwardly, and it requires right and deep prove.
As far as knowing, common societies leave it to ones choice to vote or not, and to give an empty or invalide vote is also a possibility.
It's all, of course, a matter how much one depends on ones community, nourishes on it's fruits, regards it as own, or is bond.
The Sublime Buddha didn't go much into common sociaties issues aside of the Kalama Sutta, where a community asked whom to follow. Other duties in relations are pointed out in the Sigala Sutta. And generally, especial opposing one's leaders is Kamma leading downward, toward hell (something everywhere obserable).
Against common ideas the Sublime Buddha didn't see much benefit in pseudo-liberalism and elders, fathers, people of goodness (merits) are proper to be regarded.
A younger leader said some days something to consider: "power (here of media) should not be feared but respected". In the eye of right view and gratitude many things are actually much different as when in mood of wrong view, thinking "i have a right", and ingratitude.
A gift, how ever, to vote, like all gifts, should be, if taken on, used careful and wisely, and it's not required to take on a gift. Sometimes a gift can be to heavy for one, or not of use.
Someone having left societies, lives from what is given in faith, has no more to do with such, and of course it would be improper to take side in regard of worldily preverances.
There are many Suttas explaining the reasons for welfare and prosperity of communities, families, societies, nations and itjs of course a matter on Upanissaya and it's Paccaya where to arise and where to go on.
Unity and peace are, how ever, much below any personal preference, especially under those with equal virtues.